Contents

Lenovo ThinkStation P348 Workstation Hardware Maintenance Manual PDF

1 of 100
1 of 100

Summary of Content for Lenovo ThinkStation P348 Workstation Hardware Maintenance Manual PDF

P348 Hardware Maintenance Manual

Third Edition (September 2022)

Copyright Lenovo 2022.

LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant to a General Services Administration GSA contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS- 35F-05925.

Contents

Chapter 1. Important safety information . . . . . . . . . . . . . . . . 1 General safety . . . . . . . . . . . . . . . . 1 Electrical safety . . . . . . . . . . . . . . . . 2 Safety inspection guide . . . . . . . . . . . . . 3 Handling electrostatic discharge-sensitive devices . . . . . . . . . . . . . . . . . . . 4 Grounding requirements . . . . . . . . . . . . 4 Safety notices (multi-lingual translations) . . . . . . 4

Chapter 2. Important service information . . . . . . . . . . . . . . . 27 Strategy for replacing FRUs . . . . . . . . . . 27

Strategy for replacing a hard disk drive or a solid-state drive . . . . . . . . . . . . . 27 Important notice for replacing a system board . . . . . . . . . . . . . . . . . 27 How to use error codes . . . . . . . . . . 28

Strategy for replacing FRUs for CTO, special-bid, and standard models. . . . . . . . . . . . . 28

Product definition . . . . . . . . . . . . 28 FRU identification . . . . . . . . . . . . 28

Chapter 3. Product overview . . . . . 29 Front . . . . . . . . . . . . . . . . . . . 29 Rear . . . . . . . . . . . . . . . . . . . 30

Chapter 4. Service checkout and symptom-to-FRU index . . . . . . . . 31 Service checkout . . . . . . . . . . . . . . 31

Problem determination tips . . . . . . . . 31 Symptom-to-FRU index . . . . . . . . . . . 32

Hard disk drive boot error . . . . . . . . . 32 Power supply problems . . . . . . . . . . 33 Beep symptoms . . . . . . . . . . . . . 33 POST error codes . . . . . . . . . . . . 34 Miscellaneous error conditions . . . . . . . 34 Undetermined problems . . . . . . . . . 36

Chapter 5. Diagnostics . . . . . . . . 39 Basic procedure for resolving computer problems . . . . . . . . . . . . . . . . . 39 UEFI diagnostic program . . . . . . . . . . . 39 Lenovo diagnostic tools . . . . . . . . . . . 40 The Vantage app . . . . . . . . . . . . . . 40

Self-help resources . . . . . . . . . . . . . 40

Chapter 6. Hardware removal and installation . . . . . . . . . . . . . . . 43 Handling static-sensitive devices . . . . . . . . 43 Service tool kit . . . . . . . . . . . . . . . 43 Major FRUs and CRUs . . . . . . . . . . . . 44 System board . . . . . . . . . . . . . . . 48 Internal storage drives . . . . . . . . . . . . 49 Removing and installing hardware . . . . . . . 49

External options . . . . . . . . . . . . . 50 Computer cover . . . . . . . . . . . . . 50 Optical drive . . . . . . . . . . . . . . 51 Front bezel . . . . . . . . . . . . . . . 53 Primary storage drives . . . . . . . . . . 54 3.5-inch primary storage drive cage . . . . . 59 PCI-Express card . . . . . . . . . . . . 59 Graphics card. . . . . . . . . . . . . . 60 M.2 solid-state drive and heat sink . . . . . 64 M.2 solid-state drive bracket . . . . . . . . 65 Optical drive cage . . . . . . . . . . . . 66 Secondary storage drive . . . . . . . . . 68 Front fan . . . . . . . . . . . . . . . . 70 Rear fan . . . . . . . . . . . . . . . . 71 Heat-sink-and-fan assembly . . . . . . . . 73 Chassis beam. . . . . . . . . . . . . . 75 Memory module . . . . . . . . . . . . . 77 Coin-cell battery. . . . . . . . . . . . . 78 Power supply assembly . . . . . . . . . . 79 E-lock . . . . . . . . . . . . . . . . . 80 Front I/O bracket, power button cable, and card reader . . . . . . . . . . . . . . . 81 Internal speaker . . . . . . . . . . . . . 83 Wi-Fi card . . . . . . . . . . . . . . . 83 Front Wi-Fi antenna . . . . . . . . . . . 84 Rear Wi-Fi antenna. . . . . . . . . . . . 84 ThinkStation LED . . . . . . . . . . . . 86 Thermal sensor . . . . . . . . . . . . . 87 Cover presence switch cable and bracket . . . 88 Microprocessor . . . . . . . . . . . . . 89 System board. . . . . . . . . . . . . . 90

Chapter 7. Notices and trademarks. . . . . . . . . . . . . . . 93

Copyright Lenovo 2022 i

About this manual

This manual provides service and reference information for ThinkStation computers listed on the front cover.

Illustrations in this manual might look different from your product.

Use this manual along with the advanced diagnostic tests to troubleshoot problems.

Important: This manual is intended only for trained service technicians who are familiar with ThinkStation computers. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively. Before servicing a ThinkStation computer, be sure to read and understand Chapter 1 Important safety information on page 1.

Chapter 1. Important safety information

General safety Follow these rules to ensure general safety:

Observe good housekeeping in the area of the machines during and after maintenance.

When lifting any heavy object:

1. Ensure you can stand safely without slipping.

2. Distribute the weight of the object equally between your feet.

3. Use a slow lifting force. Never move suddenly or twist when you attempt to lift.

4. Lift by standing or by pushing up with your leg muscles; this action removes the strain from the muscles in your back.

Attention: Do not attempt to lift any objects that weigh more than 16 kg (35 lb) or objects that you think are too heavy for you.

Do not perform any action that causes hazards to the customer, or that makes the equipment unsafe.

Before you start the machine, ensure that other service representatives and the customer's personnel are not in a hazardous position.

Place removed covers and other parts in a safe place, away from all personnel, while you are servicing the machine.

Keep your tool case away from walk areas so that other people will not trip over it.

Do not wear loose clothing that can be trapped in the moving parts of a machine. Ensure that your sleeves are fastened or rolled up above your elbows. If your hair is long, fasten it.

Insert the ends of your necktie or scarf inside clothing or fasten it with a nonconductive clip, approximately 8 centimeters (3 inches) from the end.

Do not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners for your clothing.

Remember: Metal objects are good electrical conductors.

Wear safety glasses when you are: hammering, drilling, soldering, cutting wire, attaching springs, using solvents, or working in any other conditions that might be hazardous to your eyes.

After service, reinstall all safety shields, guards, labels, and ground wires. Replace any safety device that is worn or defective.

Reinstall all covers correctly before returning the machine to the customer.

CAUTION:

Keep fingers and other parts of your body away from hazardous, moving parts. If you suffer an injury, seek medical care immediately.

CAUTION:

Avoid contact with hot components inside the computer. During operation, some components become hot enough to burn the skin. Before you open the computer cover, turn off the computer, disconnect power, and wait approximately 10 minutes for the components to cool.

Copyright Lenovo 2022 1

Electrical safety

CAUTION: Electrical current from power, telephone, and communication cables can be hazardous. To avoid personal injury or equipment damage, disconnect the attached power cords, telecommunication systems, networks, and modems before you open the computer covers, unless instructed otherwise in the installation and configuration procedures.

Observe the following rules when working on electrical equipment.

Important: Use only approved tools and test equipment. Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical currents. Many customers have, near their equipment, rubber floor mats that contain small conductive fibers to decrease electrostatic discharges. Do not use this type of mat to protect yourself from electrical shock.

Find the room emergency power-off (EPO) switch, disconnecting switch, or electrical outlet. If an electrical accident occurs, you can then operate the switch or unplug the power cord quickly.

Do not work alone under hazardous conditions or near equipment that has hazardous voltages.

Disconnect all power before:

Performing a mechanical inspection

Working near power supplies

Removing or installing Field Replaceable Units (FRUs)

Before you start to work on the machine, unplug the power cord. If you cannot unplug it, ask the customer to power-off the wall box that supplies power to the machine and to lock the wall box in the off position.

If you need to work on a machine that has exposed electrical circuits, observe the following precautions:

Ensure that another person, familiar with the power-off controls, is near you. Remember: Another person must be there to switch off the power, if necessary.

Use only one hand when working with powered-on electrical equipment; keep the other hand in your pocket or behind your back. Remember: There must be a complete circuit to cause electrical shock. By observing the above rule, you may prevent a current from passing through your body.

When using a tester, set the controls correctly and use the approved probe leads and accessories for that tester.

Stand on suitable rubber mats (obtained locally, if necessary) to insulate you from grounds such as metal floor strips and machine frames.

Observe the special safety precautions when you work with very high voltages; these instructions are in the safety sections of maintenance information. Use extreme care when measuring high voltages.

Regularly inspect and maintain your electrical hand tools for safe operational condition.

Do not use worn or broken tools and testers.

Never assume that power has been disconnected from a circuit. First, check that it has been powered-off.

Always look carefully for possible hazards in your work area. Examples of these hazards are moist floors, nongrounded power extension cables, power surges, and missing safety grounds.

Do not touch live electrical circuits with the reflective surface of a plastic dental mirror. The surface is conductive; such touching can cause personal injury and machine damage.

Do not service the following parts with the power on when they are removed from their normal operating places in a machine:

2 P348 Hardware Maintenance Manual

Power supply units

Pumps

Blowers and fans

Motor generators

and similar units. (This practice ensures correct grounding of the units.)

If an electrical accident occurs:

Use caution; do not become a victim yourself.

Switch off power.

Send another person to get medical aid.

Safety inspection guide The intent of this inspection guide is to assist you in identifying potentially unsafe conditions on these products. Each machine, as it was designed and built, had required safety items installed to protect users and service personnel from injury. This guide addresses only those items. However, good judgment should be used to identify potential safety hazards due to attachment of features or options not covered by this inspection guide.

If any unsafe conditions are present, you must determine how serious the apparent hazard could be and whether you can continue without first correcting the problem.

Consider these conditions and the safety hazards they present:

Electrical hazards, especially primary power (primary voltage on the frame can cause serious or fatal electrical shock).

Explosive hazards, such as a damaged CRT face or bulging capacitor

Mechanical hazards, such as loose or missing hardware

The guide consists of a series of steps presented in a checklist. Begin the checks with the power off, and the power cord disconnected.

Checklist:

1. Check exterior covers for damage (loose, broken, or sharp edges).

2. Power-off the computer. Disconnect the power cord.

3. Check the power cord for:

a. A third-wire ground connector in good condition. Use a meter to measure third-wire ground continuity for 0.1 ohm or less between the external ground pin and frame ground.

b. The power cord should be the appropriate type as specified in the parts listings.

c. Insulation must not be frayed or worn.

4. Remove the cover.

5. Check for any obvious alterations. Use good judgment as to the safety of any alterations.

6. Check inside the unit for any obvious unsafe conditions, such as metal filings, contamination, water or other liquids, or signs of fire or smoke damage.

7. Check for worn, frayed, or pinched cables.

8. Check that the power-supply cover fasteners (screws or rivets) have not been removed or tampered with.

Chapter 1. Important safety information 3

Handling electrostatic discharge-sensitive devices Any computer part containing transistors or integrated circuits (ICs) should be considered sensitive to electrostatic discharge (ESD). ESD damage can occur when there is a difference in charge between objects. Protect against ESD damage by equalizing the charge so that the machine, the part, the work mat, and the person handling the part are all at the same charge.

Notes:

1. Use product-specific ESD procedures when they exceed the requirements noted here.

2. Make sure that the ESD protective devices you use have been certified (ISO 9000) as fully effective.

When handling ESD-sensitive parts:

Keep the parts in protective packages until they are inserted into the product.

Avoid contact with other people while handling the part.

Wear a grounded wrist strap against your skin to eliminate static on your body.

Prevent the part from touching your clothing. Most clothing is insulative and retains a charge even when you are wearing a wrist strap.

Use the black side of a grounded work mat to provide a static-free work surface. The mat is especially useful when handling ESD-sensitive devices.

Select a grounding system, such as those listed below, to provide protection that meets the specific service requirement.

Note: The use of a grounding system is desirable but not required to protect against ESD damage.

Attach the ESD ground clip to any frame ground, ground braid, or green-wire ground.

Use an ESD common ground or reference point when working on a double-insulated or battery- operated system. You can use coax or connector-outside shells on these systems.

Use the round ground-prong of the ac plug on ac-operated computers.

Grounding requirements Electrical grounding of the computer is required for operator safety and correct system function. Proper grounding of the electrical outlet can be verified by a certified electrician.

Safety notices (multi-lingual translations) The caution and danger safety notices in this section are provided in the following languages:

English

Arabic

Brazilian/Portuguese

Chinese (simplified)

Chinese (traditional)

French

German

Hebrew

Italian

Korean

4 P348 Hardware Maintenance Manual

Spanish

DANGER

Electrical current from power, telephone and communication cables is hazardous.

To avoid a shock hazard:

Do not connect or disconnect any cables or perform installation, maintenance, or reconfiguration of this product during an electrical storm.

Connect all power cords to a properly wired and grounded electrical outlet.

Connect to properly wired outlets any equipment that will be attached to this product.

When possible, use one hand only to connect or disconnect signal cables.

Never turn on any equipment when there is evidence of fire, water, or structural damage.

Disconnect the attached power cords, telecommunications systems, networks, and modems before you open the device covers, unless instructed otherwise in the installation and configuration procedures.

Connect and disconnect cables as described in the following tables when installing, moving, or opening covers on this product or attached devices.

To Connect To Disconnect

1. Turn everything OFF.

2. First, attach all cables to devices.

3. Attach signal cables to connectors.

4. Attach power cords to outlet.

5. Turn device ON.

1. Turn everything OFF.

2. First, remove power cords from outlet.

3. Remove signal cables from connectors.

4. Remove all cables from devices.

CAUTION: When replacing the lithium battery, use only Part Number 45C1566 or an equivalent type battery recommended by the manufacturer. If your system has a module containing a lithium battery, replace it only with the same module type made by the same manufacturer. The battery contains lithium and can explode if not properly used, handled, or disposed of. Do not:

Throw or immerse into water

Heat to more than 100C (212F)

Repair or disassemble

Dispose of the battery as required by local ordinances or regulations.

CAUTION:

Chapter 1. Important safety information 5

When laser products (such as CD-ROMs, DVD-ROM drives, fiber optic devices, or transmitters) are installed, note the following:

Do not remove the covers. Removing the covers of the laser product could result in exposure to hazardous laser radiation. There are no serviceable parts inside the device.

Use of controls or adjustments or performance of procedures other than those specified herein might result in hazardous radiation exposure.

DANGER

Some laser products contain an embedded Class 3A or Class 3B laser diode. Note the following: Laser radiation when open. Do not stare into the beam, do not view directly with optical instruments, and avoid direct exposure to the beam.

18 kg (37 lb) 32 kg (70.5 lb) 55 kg (121.2 lb)

CAUTION: Use safe practices when lifting.

CAUTION: The power control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source.

1

2

6 P348 Hardware Maintenance Manual

Chapter 1. Important safety information 7

18 kg (37 lb) 32 kg (70.5 lb) 55 kg (121.2 lb)

1

2

8 P348 Hardware Maintenance Manual

PERIGO

A corrente eltrica proveniente de cabos de alimentao, de telefone e de comunicaes perigosa.

Para evitar risco de choque eltrico:

No conecte nem desconecte nenhum cabo ou execute instalao, manuteno ou reconfigurao deste produto durante uma tempestade com raios.

Conecte todos os cabos de alimentao a tomadas eltricas corretamente instaladas e aterradas.

Todo equipamento que for conectado a este produto deve ser conectado a tomadas corretamente instaladas.

Quando possvel, utilize apenas uma das mos para conectar ou desconectar cabos de sinal.

Nunca ligue nenhum equipamento quando houver evidncia de fogo, gua ou danos estruturais.

Antes de abrir tampas de dispositivos, desconecte cabos de alimentao, sistemas de telecomunicao, redes e modems conectados, a menos que especificado de maneira diferente nos procedimentos de instalao e configurao.

Conecte e desconecte os cabos conforme descrito na tabela apresentada a seguir ao instalar, mover ou abrir tampas deste produto ou de dispositivos conectados.

Para Conectar: Para Desconectar:

1. DESLIGUE Tudo.

2. Primeiramente, conecte todos os cabos aos dispositivos.

3. Conecte os cabos de sinal aos conectores.

4. Conecte os cabos de alimentao s tomadas.

5. LIGUE os dispositivos.

1. DESLIGUE Tudo.

2. Primeiramente, remova os cabos de alimentao das tomadas.

3. Remova os cabos de sinal dos conectores.

4. Remova todos os cabos dos dispositivos.

CUIDADO:

Ao substituir a bateria de ltio, utilize apenas uma bateria com Nmero de Pea 45C1566 ou um tipo de bateria equivalente recomendado pelo Se o seu sistema possui um mdulo com uma bateria de ltio, substitua-o apenas por um mdulo do mesmo tipo e do mesmo fabricante. A bateria contm ltio e pode explodir se no for utilizada, manuseada ou descartada de maneira correta.

No:

Jogue ou coloque na gua

Aquea a mais de 100C (212F)

Conserte nem desmonte

Descarte a bateria conforme requerido pelas leis ou regulamentos locais.

Chapter 1. Important safety information 9

PRECAUCIN:

Quando produtos a laser (como unidades de CD-ROMs, unidades de DVD-ROM, dispositivos de fibra tica ou transmissores) estiverem instalados, observe o seguinte:

No remova as tampas. A remoo das tampas de um produto a laser pode resultar em exposio prejudicial radiao de laser. No existem peas que podem ser consertadas no interior do dispositivo.

A utilizao de controles ou ajustes ou a execuo de procedimentos diferentes dos especificados aqui pode resultar em exposio prejudicial radiao.

PERIGO

Alguns produtos a laser contm diodo de laser integrado da Classe 3A ou da Classe 3B. Observe o seguinte:

Radiao a laser quando aberto. No olhe diretamente para o feixe a olho nu ou com instrumentos pticos e evite exposio direta ao feixe.

18 kg (37 lb) 32 kg (70.5 lb) 55 kg (121.2 lb)

CUIDADO:

Utilize procedimentos de segurana para levantar equipamentos.

CUIDADO:

O boto de controle de alimentao do dispositivo e o boto para ligar/desligar da fonte de alimentao no desligam a corrente eltrica fornecida ao dispositivo. O dispositivo tambm pode ter mais de um cabo de alimentao. Para remover toda a corrente eltrica do dispositivo, assegure que todos os cabos de alimentao estejam desconectados da fonte de alimentao.

1

2

10 P348 Hardware Maintenance Manual

Chapter 1. Important safety information 11

1

2

12 P348 Hardware Maintenance Manual

Chapter 1. Important safety information 13

1

2

DANGER

Le courant lectrique provenant de l'alimentation, du tlphone et des cbles de transmission peut prsenter un danger.

Pour viter tout risque de choc lectrique :

Ne manipulez aucun cble et n'effectuez aucune opration d'installation, d'entretien ou de reconfiguration de ce produit au cours d'un orage.

Branchez tous les cordons d'alimentation sur un socle de prise de courant correctement cbl et mis la terre.

Branchez sur des socles de prise de courant correctement cbls tout quipement connect ce produit.

Lorsque cela est possible, n'utilisez qu'une seule main pour connecter ou dconnecter les cbles d'interface.

Ne mettez jamais un quipement sous tension en cas d'incendie ou d'inondation, ou en prsence de dommages matriels.

Avant de retirer les carters de l'unit, mettez celle-ci hors tension et dconnectez ses cordons d'alimentation, ainsi que les cbles qui la relient aux rseaux, aux systmes de tlcommunication et aux modems (sauf instruction contraire mentionne dans les procdures d'installation et de configuration).

Lorsque vous installez, que vous dplacez, ou que vous manipulez le prsent produit ou des priphriques qui lui sont raccords, reportez-vous aux instructions ci-dessous pour connecter et dconnecter les diffrents cordons.

14 P348 Hardware Maintenance Manual

Connexion Dconnexion

1. Mettez les units HORS TENSION.

2. Commencez par brancher tous les cordons sur les units.

3. Branchez les cbles d'interface sur des connecteurs.

4. Branchez les cordons d'alimentation sur des prises.

5. Mettez les units SOUS TENSION.

1. Mettez les units HORS TENSION.

2. Dbranchez les cordons d'alimentation des prises.

3. Dbranchez les cbles d'interface des connecteurs.

4. Dbranchez tous les cbles des units.

ATTENTION:

Remplacer la pile au lithium usage par une pile de rfrence identique exclusivement, (rfrence 45C1566), ou suivre les instructions du fabricant qui en dfinit les quivalences. Si votre systme est dot d'un module contenant une pile au lithium, vous devez le remplacer uniquement par un module identique, produit par le mme fabricant. La pile contient du lithium et peut exploser en cas de mauvaise utilisation, de mauvaise manipulation ou de mise au rebut inapproprie.

Ne pas :

la jeter l'eau,

l'exposer des tempratures suprieures 100C,

chercher la rparer ou la dmonter.

Ne pas mettre la pile la poubelle. Pour la mise au rebut, se reporter la rglementation en vigueur.

ATTENTION:

Si des produits laser (tels que des units de CD-ROM, de DVD-ROM, des units fibres optiques, ou des metteurs) sont installs, prenez connaissance des informations suivantes :

Ne retirez pas le carter. En ouvrant l'unit de CD-ROM ou de DVD-ROM, vous vous exposez au rayonnement dangereux du laser. Aucune pice de l'unit n'est rparable.

Pour viter tout risque d'exposition au rayon laser, respectez les consignes de rglage et d'utilisation des commandes, ainsi que les procdures dcrites dans le prsent manuel.

DANGER

Certains produits laser contiennent une diode laser intgre de classe 3A ou 3B. Prenez connaissance des informations suivantes:

Rayonnement laser lorsque le carter est ouvert. Evitez toute expositiondirecte au rayon laser. Evitez de regarder fixement le faisceau ou del'observer l'aide d'instruments optiques.

Chapter 1. Important safety information 15

18 kg (37 lb) 32 kg (70.5 lb) 55 kg (121.2 lb)

ATTENTION:

Soulevez la machine avec prcaution.

ATTENTION:

L'interrupteur de contrle d'alimentation de l'unit et l'interrupteur dubloc d'alimentation ne coupent pas le courant lectrique alimentantl'unit. En outre, le systme peut tre quip de plusieurs cordonsd'alimentation. Pour mettre l'unit hors tension, vous devez dconnectertous les cordons de la source d'alimentation.

1

2

VORSICHT

An Netz-, Telefon- und Datenleitungen knnen gefhrliche Spannungen anliegen.

Aus Sicherheitsgrnden:

Bei Gewitter an diesem Gert keine Kabel anschlieen oder lsen. Ferner keine Installations-, Wartungs- oder Rekonfigurationsarbeiten durchfhren.

Gert nur an eine Schutzkontaktsteckdose mit ordnungsgem geerdetem Schutzkontakt anschlieen.

Alle angeschlossenen Gerte ebenfalls an Schutzkontaktsteckdosen mit ordnungsgem geerdetem Schutzkontakt anschlieen.

Die Signalkabel nach Mglichkeit einhndig anschlieen oder lsen, um einen Stromschlag durch Berhren von Oberflchen mit unterschiedlichem elektrischem Potenzial zu vermeiden.

16 P348 Hardware Maintenance Manual

Gerte niemals einschalten, wenn Hinweise auf Feuer, Wasser oder Gebudeschden vorliegen.

Die Verbindung zu den angeschlossenen Netzkabeln, Telekommunikationssystemen, Netzwerken und Modems ist vor dem ffnen des Gehuses zu unterbrechen, sofern in den Installations- und Konfigurationsprozeduren keine anders lautenden Anweisungen enthalten sind.

Zum Installieren, Transportieren und ffnen der Abdeckungen des Computers oder der angeschlossenen Einheiten die Kabel gem der folgenden Tabelle anschlieen und abziehen.

Zum Anschlieen der Kabel gehen Sie wie folgt vor Zum Abziehen der Kabel gehen Sie wie folgt vor

1. Schalten Sie alle Einheiten AUS.

2. Schlieen Sie erst alle Kabel an die Einheiten an.

3. Schlieen Sie die Signalkabel an die Buchsen an.

4. Schlieen Sie die Netzkabel an die Steckdose an.

5. Schalten Sie die Einheit EIN.

1. Schalten Sie alle Einheiten AUS.

2. Ziehen Sie zuerst alle Netzkabel aus den Netzsteckdosen.

3. Ziehen Sie die Signalkabel aus den Buchsen.

4. Ziehen Sie alle Kabel von den Einheiten ab.

CAUTION:

Eine verbrauchte Lithiumbatterie nur durch eine Batterie mit der Teilenummer 45C1566 oder eine gleichwertige, vom Hersteller empfohlene Batterie ersetzen. Enthlt das System ein Modul mit einer Lithiumbatterie, dieses nur durch ein Modul desselben Typs und von demselben Hersteller ersetzen. Die Batterie enthlt Lithium und kann bei unsachgemer Verwendung, Handhabung oder Entsorgung explodieren.

Die Batterie nicht:

mit Wasser in Berhrung bringen.

ber 100 C erhitzen.

reparieren oder zerlegen.

Die rtlichen Bestimmungen fr die Entsorgung von Sondermll beachten.

ACHTUNG:

Bei der Installation von Lasergerten (wie CD-ROM-Laufwerken, DVD- aufwerken, Einheiten mit Lichtwellenleitertechnik oder Sendern) Folgendes beachten:

Die Abdeckungen nicht entfernen. Durch Entfernen der Abdeckungen des Lasergerts knnen gefhrliche Laserstrahlungen freigesetzt werden. Das Gert enthlt keine zu wartenden Teile.

Werden Steuerelemente, Einstellungen oder Durchfhrungen von Prozeduren anders als hier angegeben verwendet, kann gefhrliche Laserstrahlung auftreten.

VORSICHT

Chapter 1. Important safety information 17

Einige Lasergerte enthalten eine Laserdiode der Klasse 3A oder 3B. Beachten Sie Folgendes:

Laserstrahlung bei geffneter Verkleidung. Nicht in den Strahl blicken. Keine Lupen oder Spiegel verwenden. Strahlungsbereich meiden.

18 kg 32 kg 55 kg

ACHTUNG:

Arbeitsschutzrichtlinien beim Anheben der Maschine beachten.

ACHTUNG:

Mit dem Netzschalter an der Einheit und am Netzteil wird die Stromversorgung fr die Einheit nicht unterbrochen. Die Einheit kann auch mit mehreren Netzkabeln ausgestattet sein. Um die Stromversorgung fr die Einheit vollstndig zu unterbrechen, mssen alle zum Gert fhrenden Netzkabel vom Netz getrennt werden.

1

2

18 P348 Hardware Maintenance Manual

Chapter 1. Important safety information 19

1

2

PERICOLO

La corrente elettrica proveniente dai cavi di alimentazione, del telefono e di comunicazione pu essere pericolosa.

20 P348 Hardware Maintenance Manual

Per evitare il rischio di scosse elettriche:

Non collegare o scollegare qualsiasi cavo oppure effettuare l'installazione, la manutenzione o la riconfigurazione del prodotto durante un temporale.

Collegare tutti i fili elettrici a una presa di alimentazione correttamente cablata e dotata di messa a terra.

Collegare alle prese elettriche appropriate tutte le apparecchiature che verranno utilizzate per questo prodotto.

Se possibile, utilizzare solo una mano per collegare o scollegare i cavi di segnale.

Non accendere assolutamente apparecchiature in presenza di incendi, perdite d'acqua o danno strutturale.

Scollegare i cavi di alimentazione, i sistemi di telecomunicazione, le reti e il modem prima di aprire i coperchi del dispositivo, salvo istruzioni contrarie relative alle procedure di installazione e configurazione.

Collegare e scollegare i cavi come descritto nella seguente tabella quando vengono effettuate operazioni di installazione, spostamento o apertura dei coperchi di questo prodotto o delle unit collegate.

Per collegarsi Per scollegarsi

1. SPEGNERE le apparecchiature.

2. Innanzitutto, collegare tutti i cavi alle unit.

3. Collegare i cavi di segnale ai connettori.

4. Collegare i cavi di alimentazione alla presa.

5. Accendere l'unit.

1. SPEGNERE le apparecchiature.

2. Innanzitutto, rimuovere i cavi di alimentazione dalla presa.

3. Rimuovere i cavi di segnale dai connettori.

4. Rimuovere tutti i cavi dalle unit.

ATTENZIONE:

Quando si sostituisce la batteria al litio, utilizzare solo il Numero parte 45C1566 o un tipo di batteria equivalente consigliato dal produttore. Se sul sistema presente un modulo che contiene una batteria al litio, sostituirlo solo con un tipo di modulo dello stesso tipo della stessa casa di produzione. La batteria contiene litio e pu esplodere se usata, maneggiata o smaltita in modo non corretto.

Non:

Gettare o immergere la batteria nell'acqua

Riscaldarla ad una temperatura superiore ai 100 gradi C (212 gradi F)

Smontarla, ricaricarla o tentare di ripararla

Le batterie usate vanno smaltite in accordo alla normativa in vigore (DPR 915/82 e successive disposizioni e disposizioni locali).

ATTENZIONE:

Chapter 1. Important safety information 21

Quando vengono installati prodotti laser (quali CD-ROM, unit DVD-ROM, unit a fibre ottiche o trasmittenti), tener presente quanto segue:

Non rimuovere gli sportelli. L'apertura di un'unit laser pu determinare l'esposizione a radiazioni laser pericolose. All'interno dell'unit non vi sono parti su cui effettuare l'assistenza tecnica.

L'utilizzo di controlli, regolazioni o l'esecuzione di procedure non descritti nel presente manuale possono provocare l'esposizione a radiazioni pericolose.

PERICOLO

Alcune unit laser contengono un diodo laser di Classe 3A o Classe 3B. Tener presente quanto segue:

Aprendo l'unit vengono emesse radiazioni laser. Non fissare il fascio, non guardarlo direttamente con strumenti ottici ed evitare l'esposizione al fascio.

18 kg 32 kg 55 kg

ATTENZIONE:

Prestare attenzione nel sollevare l'apparecchiatura.

ATTENZIONE:

Il pulsante di controllo dell'alimentazione presente sull'unit e l'interruttore dell'alimentatore non disattivano l'alimentazione corrente fornita all'unit. E' possibile che l'unit disponga di pi cavi di alimentazione. Per disattivare l'alimentazione dall'unit, accertarsi che tutti i cavi di alimentazione siano scollegati dalla fonte di alimentazione.

1

2

22 P348 Hardware Maintenance Manual

Chapter 1. Important safety information 23

1

2

PELIGRO

La corriente elctrica procedente de cables de alimentacin, telfonos y cables de comunicacin puede ser peligrosa.

Para evitar el riesgo de descarga elctrica:

No conecte ni desconecte los cables ni realice ninguna tarea de instalacin, mantenimiento o reconfiguracin de este producto durante una tormenta elctrica.

Conecte todos los cables de alimentacin a tomas de corriente debidamente cableadas y conectadas a tierra.

24 P348 Hardware Maintenance Manual

Cualquier equipo que se conecte a este producto tambin debe conectarse a tomas de corriente debidamente cableadas.

Siempre que sea posible, utilice una sola mano para conectar o desconectar los cables de seal.

No encienda nunca un equipo cuando hay seales de fuego, agua o daos estructurales.

Desconecte los cables de alimentacin, los sistemas de telecomunicaciones, las redes y los mdems conectados antes de abrir las cubiertas de los dispositivos, a menos que se indique lo contrario en los procedimientos de instalacin y configuracin.

Conecte y desconecte los cables, como se describe en la tabla siguiente, cuando instale, mueva o abra las cubiertas de este producto o de los dispositivos conectados.

Para conectar Para desconectar

1. APGUELO todo.

2. En primer lugar, conecte todos los cables a los dispositivos.

3. Conecte los cables de seal a los conectores.

4. Enchufe los cables de alimentacin a las tomas de corriente.

5. Encienda el dispositivo.

1. APGUELO todo.

2. En primer lugar, desenchufe los cables de alimentacin de las tomas de corriente.

3. Desconecte los cables de seal de los conectores.

4. Desconecte todos los cables de los dispositivos.

PRECAUCIN:

Cuando sustituya una batera de litio, utilice solamente una batera nmero de pieza 45C1566 u otra de tipo equivalente recomendada por el fabricante. Si su sistema dispone de un mdulo que contiene una batera de litio, reemplcelo slo con el mismo tipo de mdulo, del mismo fabricante. La batera contiene litio y puede explotar si no se utiliza, manipula o desecha correctamente.

No debe:

Arrojarla al agua o sumergirla en ella

Exponerla a temperaturas superiores a 100C (212F)

Repararla o desmontarla

Deshgase de la batera segn especifiquen las leyes o normas locales.

PRECAUCIN:

Cuando haya productos lser (como unidades de CD-ROM, unidades de DVD, dispositivos de fibra ptica o transmisores) instalados, tenga en cuenta lo siguiente:

No quite las cubiertas. Si quita las cubiertas del producto lser, podra quedar expuesto a radiacin lser peligrosa. Dentro del dispositivo no existe ninguna pieza que requiera servicio tcnico.

Si usa controles o ajustes o realiza procedimientos que no sean los especificados aqu, podra exponerse a radiaciones peligrosas.

Chapter 1. Important safety information 25

PELIGRO

Algunos productos lser tienen incorporado un diodo lser de clase 3A o clase 3B. Tenga en cuenta lo siguiente:

Cuando se abre, queda expuesto a radiacin lser. No mire directamente al rayo lser, ni siquiera con instrumentos pticos, y evite exponerse directamente al rayo lser.

18 kg 32 kg 55 kg

PRECAUCIN:

Adopte procedimientos seguros al levantar el equipo.

PRECAUCIN:

El botn de control de alimentacin del dispositivo y el interruptor de alimentacin de la fuente de alimentacin no desconectan la corriente elctrica suministrada al dispositivo. Adems, el dispositivo podra tener ms de un cable de alimentacin. Para suprimir toda la corriente elctrica del dispositivo, asegrese de que todos los cables de alimentacin estn desconectados de la toma de corriente.

1

2

26 P348 Hardware Maintenance Manual

Chapter 2. Important service information

Strategy for replacing FRUs

Before replacing parts:

Ensure that all software fixes, drivers, and UEFI BIOS downloads are installed before you replace any FRUs listed in this manual.

After a system board is replaced, ensure that the latest UEFI BIOS is loaded to the system board before you complete the service action.

To download and install software fixes, drivers, and UEFI BIOS, go to https://pcsupport.lenovo.com and follow the instructions on the screen.

Use the following strategy to prevent unnecessary expense for replacing and servicing FRUs:

If you are instructed to replace a FRU but the replacement does not correct the problem, reinstall the original FRU before you continue.

Some computers have both a processor board and a system board. If you are instructed to replace either the processor board or the system board, and replacing one of them does not correct the problem, reinstall that board, and then replace the other one.

If an adapter or a device consists of more than one FRU, any of the FRUs might be the cause of the error. Before replacing the adapter or device, remove the FRUs, one by one, to see if the symptoms change. Replace only the FRU that changed the symptoms.

Strategy for replacing a hard disk drive or a solid-state drive Always try to run a low-level format operation before replacing a hard disk drive or a solid-state drive. This will cause all customer data on the drive to be lost. Ensure that the customer has a current backup of the data before you perform this task.

Attention: The drive startup sequence in the computer you are servicing might have been changed. Be extremely careful during write operations such as copying, saving, or formatting. If you select an incorrect drive, data or programs can be overwritten.

Important notice for replacing a system board Some components mounted on a system board are very sensitive. Improper handling of a system board can cause damage to those components, and may cause a system malfunction.

After replacing the system board, use the Golden Key U1 tool to bind the model type, serial number, and Brand ID of the computer with the new system board. Refer to https://support.lenovo.com/us/en/solutions/ ht507251 for instructions.

Attention: When handling a system board:

Do not drop a system board or apply any excessive force to it.

Avoid rough handling of any kind.

Avoid bending a system board and hard pushing to prevent cracking at each Ball Grid Array (BGA) chipset.

Copyright Lenovo 2022 27

How to use error codes Use the error codes displayed on the screen to diagnose failures. If more than one error code is displayed, begin the diagnosis with the first error code. Whatever causes the first error code might also cause false error codes. If no error code is displayed, see whether the error symptom is listed in the Symptom-to-FRU Index section.

Strategy for replacing FRUs for CTO, special-bid, and standard models This topic provides information about the model types and FRU identification.

Product definition This topic introduces different model types and how to identify each type.

Dynamic Configure To Order (CTO) model

This model provides the ability for a customer to configure a Lenovo solution from a Web site, and have this configuration sent to fulfillment, where it is built and shipped directly to the customer. The machine label and eSupport will load these products as the 4-character MT, 4-character model, and 2-character country code. The model is CTO1 and the default country code is WW (example: 20AACTO1WW).

Special-bid model

This model is a unique configuration that has been negotiated between Lenovo and the customer. A unique MTM consists of a 4-character MT, a 4-character model, and a numeric 2-character country code is provided to the customer to place orders (example: 20AA000955). The country code assigned is numeric and does not designate a specific country or region. The custom model factsheet for the MTM indicates which country the special-bid MTM is set up for. Special-bid offering is not generally announced.

Standard model

Standard models (fixed configuration) are announced and offered to all customers. The MTM portion of the machine label consists of a 4-character MT, a 4-character model, and an alphabetic 2-character country code. The country code assigned is alphabetic and represents a designated country or region (example: 20AA0009UK).

FRU identification To identify FRUs for a product, do the following:

1. Go to: https://support.lenovo.com/partslookup.

2. Type the Machine Type in the corresponding field to get a general FRU list, or type the Serial Number for more detailed FRU information.

28 P348 Hardware Maintenance Manual

Chapter 3. Product overview

Front

Item Description Item Description

1 Optical drive eject button* 2 Optical drive activity indicator*

3 Flex bay* 4 Internal speaker

5 ThinkStation LED 6 Power button with power indicator

7 Storage drive activity indicator 8 SD-card slot*

9 Microphone connector 10 Headset connector

11 USB 3.2 connectors Gen 1 12 USB 3.2 connectors Gen 2

* for selected models

Copyright Lenovo 2022 29

Rear

Item Description Item Description

1 Audio line-out connector 2 Microphone connector

3 DisplayPort out connector 4 HDMI out connector

5 VGA-out connector 6 USB 2.0 connectors

7 USB 2.0 connector (with smart power-on feature) 8 Audio line-in connector

9 PS/2 mouse connector* 10 Padlock loop

11 PS/2 keyboard connector* 12 Serial connector

13 Ethernet connector 14 E-lock slots

15 Serial connector* 16 Smart cable clip slots

17 PCI-Express card area 18 Security-lock slot

19 Power cord connector

* for selected models

30 P348 Hardware Maintenance Manual

Chapter 4. Service checkout and symptom-to-FRU index

This chapter provides information about general service checkout and symptom-to-FRU index.

Service checkout Attention: The drives in the computer you are servicing might have been rearranged or the drive startup sequence changed. Be extremely careful during write operations such as copying, saving, or formatting. Data or programs can be overwritten if you select an incorrect drive.

General error messages appear if a problem or conflict is found by a program, the operating system, or both. For an explanation of these messages, refer to the information supplied with that software package.

Use the following procedure to help determine the cause of the problem:

1. Turn off the computer and all external devices.

2. Check all cables and power cords.

3. Set all display controls to the middle position.

4. Turn on all external devices.

5. Turn on the computer. Look for displayed error codes. Listen for beep codes. Look for readable instructions or a main menu on the display.

If you did not receive the correct response, proceed to step 6 on page 31.

If you do receive the correct response, proceed to step 7 on page 31.

6. Look at the following conditions and follow the instructions:

If you hear beep codes during POST, go to Beep symptoms on page 33.

If the computer displays a POST error, go to POST error codes on page 34.

If the computer hangs and no error is displayed, continue at step 7 on page 31.

7. Run the Diagnostic programs. See Chapter 5 Diagnostics on page 39.

If you receive an error, replace the part that the diagnostic program calls out.

If the test stops and you cannot continue, replace the last device tested.

Problem determination tips Due to the variety of hardware and software combinations that can be encountered, use the following information to assist you in problem determination. If possible, have this information available when requesting assistance from Service Support and Engineering functions.

Machine type and model

Processor or hard disk drive upgrades

Failure symptom

Do diagnostics indicate a failure?

What, when, where, single, or multiple systems?

Is the failure repeatable?

Has this configuration ever worked?

Copyright Lenovo 2022 31

If it has been working, what changes were made prior to its failing?

Is this the original reported failure?

Diagnostics version

Type and version level

Hardware configuration

Print (print screen) configuration currently in use

BIOS level

Operating system software

Type and version level

Notes: To eliminate confusion, identical systems are considered identical only if they:

1. Are the exact machine type and models

2. Have the same BIOS level

3. Have the same adapters/attachments in the same locations

4. Have the same address jumpers/terminators/cabling

5. Have the same software versions and levels

6. Have the same Diagnostic Diskettes (version)

7. Have the same configuration options set in the system

8. Have the same setup for the operating system control files

Comparing the configuration and software set-up between working and non-working systems will often lead to problem resolution.

Symptom-to-FRU index The Symptom-to-FRU index lists error symptoms and possible causes. The most likely cause is listed first. Always begin with on page . This index can also be used to help you decide which FRUs to have available when servicing a computer. If you are unable to correct the problem using this index, go to Undetermined problems on page 36.

Notes:

The Symptom-to-FRU index is not specific to any machine type and are applicable to all computers.

If you have both an error message and an incorrect audio response, diagnose the error message first.

If you cannot run the diagnostic tests or you get a diagnostic error code when running a test, but did receive a POST error message, diagnose the POST error message first.

If you did not receive any error message, look for a description of your error symptoms in the first part of this index.

Hard disk drive boot error A hard disk drive boot error can have the following causes.

Error FRU/Action

The start-up drive is not in the boot sequence in configuration.

Check the configuration and ensure that the start-up drive is in the boot sequence.

No operating system installed on the boot drive. Install an operating system on the boot drive.

32 P348 Hardware Maintenance Manual

Error FRU/Action

The boot sector on the startup drive is corrupted. The drive must be formatted. Do the following:

1. Attempt to back up the data on the failing hard disk drive.

2. Using the operating system programs, format the hard disk drive.

The drive is defective. Replace the hard disk drive.

Power supply problems If you suspect a power problem, use the following procedures.

Check/Verify FRU/Action

Check the following for proper installation.

Power cord

On/Off switch connector

On/Off switch power supply connector

System board power supply connectors

Microprocessor connection

Reseat connectors

Check the power cord for continuity. Power cord

Check the power-on switch for continuity. Power-on switch

Beep symptoms Beep symptoms are tones or a series of tones separated by pauses (intervals without sound) during POST.

The following table describes the beep symptoms.

Beep symptom FRU/Action

2 short beeps: common POST error Common POST error code. See the detailed failure information in POST error codes on page 34.

3 short and 1 long beeps: DRAM memory error Perform the following actions in order:

1. Make sure that the memory modules are properly seated in the memory slots.

2. Replace the memory modules.

3. Replace the system board (for trained service personnel only).

2 long and 3 short beeps: graphics card error Perform the following actions in order:

1. Make sure that the graphics cards are properly seated in the slots.

2. Replace the graphics cards.

3. Replace the system board (for trained service personnel only).

Chapter 4. Service checkout and symptom-to-FRU index 33

POST error codes Each time you turn on the system, it performs a series of tests that check the operation of the system and some options. This series of tests are called the Power-On Self-Test, or POST. POST checks the following operations:

Some basic system-board operations

Memory operation

Video operation

Whether the boot drive is working

If the POST detects a problem, an error message appears on the screen. A single problem might cause several error messages to appear. When you correct the cause of the first error message, the other error messages probably will not appear on the screen the next time.

Error code POST error message Description/Action

0135 CPU fan failure System fan failure Power fan failure Front fan failure Rear fan failure Auxiliary fan failure ODD fan failure

This error message is displayed when a fan fails and the system might be overheating.

Press F10 to exit.

0162 Setup data integrity check failure This error indicates the checksum of BIOS Setup data in NVRAM is bad.

In BIOS Setup, the Save Changes and Exit operation is needed in order to clear this error.

0164 Memory configuration change has occurred This error message is displayed

when the memory size is changed.

Press F10 to exit.

1762 Storage device configuration change has occurred This error message is displayed

when a hard disk drive change or an optical drive change has been made.

Press F10 to exit.

Miscellaneous error conditions Message/Symptom FRU/Action

Changing display colors Display/Monitor

Computer will not power-off. See Hard disk drive boot error on page 32.

1. Power Switch

2. System Board

3. Riser card, if installed.

34 P348 Hardware Maintenance Manual

Message/Symptom FRU/Action

Computer will not RPL from server 1. Ensure that the network is in startup sequence as the first device or the first device after diskette.

2. Ensure that the network adapter is enabled for RPL.

3. Network adapter (Advise network administrator of new MAC address)

Computer will not perform a Wake On LAN (if applicable) 1. Check the power supply and signal cable connections to the network adapter.

2. Ensure that the operating system settings are set to enable Wake on LAN.

3. Ensure that the Wake On LAN feature is enabled in Setup/Configuration.

4. Ensure that the network administrator is using the correct MAC address.

5. Ensure no interrupt or I/O address conflicts.

6. Network adapter (advise network administrator of new MAC address)

Dead computer. See Hard disk drive boot error on page 32.

1. Power Supply

2. System Board

Diskette drive in-use light remains on or does not light when drive is active.

1. Diskette Drive

2. System Board

3. Diskette Drive Cable

Blank screen except for flashing cursor. 1. System Board

2. Primary Hard Disk Drive

3. Hard Disk Drive Cable

Incorrect memory size during POST 1. Run the Memory tests.

2. Memory Module

3. System Board

"Insert a Diskette" icon appears with a known-good diagnostics diskette in the first 3.5-inch diskette drive.

1. System Board

2. Diskette Drive Cable

3. Network Adapter

Intensity or color varies from left to right of characters and color bars

1. Display

2. Video adapter (if present)

3. System Board

No power or fan not running 1. See Hard disk drive boot error on page 32.

Non-system disk or disk error-type message with a known-good diagnostic diskette.

1. Diskette Drive

2. System Board

3. Diskette Drive Cable

Other display symptoms not listed above (including blank or illegible display)

1. Display

2. System Board

Chapter 4. Service checkout and symptom-to-FRU index 35

Message/Symptom FRU/Action

Power-on indicator or hard disk drive in-use light not on, but computer works correctly

1. Power switch/LED assembly

2. System Board

Printer problems 1. Printer

2. System Board

Program loads from the hard disk with a known-good diagnostics diskette in the first 3.5-inch diskette drive

1. Run the Setup Utility program and check the Startup sequence.

2. Diskette Drive

3. Diskette Drive Cable

4. System Board

5. Power Supply

RPL computer cannot access programs from its own hard disk.

1. If the network administrator is using LCCM Hybrid RPL, check the startup sequence:

a. First device - network

b. Second device - hard disk

2. Hard disk drive

RPL computer does not RPL from server 1. Check the startup sequence.

2. Check the network adapter LED status.

Serial or parallel connector device failure (system board connector)

1. External Device Self-Test OK?

2. External Device

3. Cable

4. System Board

Serial or parallel connector device failure (adapter connector)

1. External Device Self-Test OK?

2. External Device

3. Cable

4. Alternate Adapter

5. System Board

Some or all keys on the keyboard do not work 1. Keyboard

2. Keyboard Cable

3. System Board

Undetermined problems This section provides instructions on how to find out the failing devices or adapters.

1. Turn off the computer.

2. Remove or disconnect the following components (if installed) one at a time.

a. External devices (modem, printer, or mouse)

b. Any adapters

c. Memory modules

d. Extended video memory

36 P348 Hardware Maintenance Manual

e. External Cache

f. External Cache RAM

g. Hard disk drive

h. Diskette drive

3. Turn on the computer to retest the system.

4. Repeat steps 1 through 3 until you find the failing device or adapter.

If all devices and adapters have been removed, and the problem continues, replace the system board. See Chapter 6 Hardware removal and installation on page 43.

Chapter 4. Service checkout and symptom-to-FRU index 37

38 P348 Hardware Maintenance Manual

Chapter 5. Diagnostics

Use diagnostic solutions to test hardware components and report operating-system-controlled settings that interfere with the correct operation of your computer.

Basic procedure for resolving computer problems

Prerequisite

Before you start, read Chapter 1 Important safety information on page 1 and print the following instructions.

1. Check that: a. The cables for all connected devices are connected correctly and securely. b. All components have been reassembled correctly.

c. All connected devices that require ac power are connected to properly grounded and working electrical outlets.

d. All connected devices are enabled in UEFI BIOS. 2. Use an antivirus program to see if the computer has been infected by a virus. If the program detects a

virus, remove the virus. 3. Go to Self-help resources on page 40 and follow the instructions for the type of problem you are

experiencing.

4. Run the diagnostic program. 5. Recover your operating system. See Self-help resources on page 40. 6. If the problem persists, contact Lenovo.

UEFI diagnostic program A UEFI diagnostic program is preinstalled on the computer. It enables you to test memory modules and internal storage devices, view system information, and check and recover bad sectors on internal storage devices.

To run the UEFI diagnostic program, do the following:

1. Turn on the computer. If the computer cannot be turned on, go to Basic procedure for resolving computer problems on page 39. If an error code is displayed, go to Symptom-to-FRU index on page 32 for error code descriptions and troubleshooting hints.

2. Repeatedly press and release the F10 key when turning on the computer. The main screen of the UEFI diagnostic program is displayed.

3. Follow the instructions on the screen to use the diagnostic program.

The options on the main screen are as follows:

Copyright Lenovo 2022 39

Table 1. Options on the main screen of the UEFI diagnostic program

DIAGNOSTICS TOOLS

CPU [U]

DISPLAY [D]

MEMORY [E]

MOTHERBOARD [H]

PCI EXPRESS [P]

STORAGE [S]

AUDIO [Z]

OPTICAL [O]

RUN ALL [R]

SYSTEM INFORMATION [F1]

BAD BLOCK RECOVERY [F3]

SMART INFORMATION [F5]

Note: The options on the main screen might vary, depending on the hardware configuration and the UEFI diagnostic program version preinstalled on the computer.

Lenovo diagnostic tools For information about Lenovo diagnostic tools, go to: https://pcsupport.lenovo.com/lenovodiagnosticsolutions

The Vantage app The Vantage app is preinstalled on your computer. To diagnose problems with the Vantage app:

1. Type Vantage in the Windows search box and press Enter.

2. Follow the on-screen instructions and run a hardware scan.

If you are unable to isolate and resolve the problem after running the Vantage app, save and print the log files created by the program. You might need the log files when you speak to a Lenovo technical support representative.

Self-help resources Use the following self-help resources to learn more about the computer and troubleshoot problems.

Resources How to access?

Troubleshooting and frequently asked questions https://www.lenovo.com/tips

https://forums.lenovo.com

Accessibility information https://www.lenovo.com/accessibility

40 P348 Hardware Maintenance Manual

Resources How to access?

Reset or restore Windows

Use Lenovo recovery options.

1. Go to https://support.lenovo.com/ HowToCreateLenovoRecovery.

2. Follow the on-screen instructions.

Use Windows recovery options.

1. Go to https://pcsupport.lenovo.com.

2. Detect your computer or manually select your computer model.

3. Navigate to the troubleshooting menu to diagnose the operating system for recovery instructions.

Use the Vantage app to:

Configure device settings.

Download and install UEFI BIOS, drivers and firmware updates.

Secure you computer from outside threats.

Diagnose hardware problems.

Check the computer warranty status.

Access User Guide and helpful articles.

Note: The available features vary depending on the computer model.

Type Vantage in the Windows search box.

Product documentation:

Safety and Warranty Guide

Generic Safety and Compliance Notices

Setup Guide

This User Guide

Regulatory Notice

Go to https://pcsupport.lenovo.com. Then, follow the on- screen instructions to filter out the documentation you want.

Lenovo Support Web site with the latest support information of the following:

Drivers and software

Diagnostic solutions

Product and service warranty

Product and parts details

Knowledge base and frequently asked questions

https://pcsupport.lenovo.com

Windows help information

Type Get Help or Tips in the Windows search box.

Use Windows Search or the Cortana personal assistant.

Microsoft support Web site: https://support.microsoft.com

Chapter 5. Diagnostics 41

42 P348 Hardware Maintenance Manual

Chapter 6. Hardware removal and installation

This chapter provides instructions on how to remove and install hardware for your computer.

Handling static-sensitive devices Do not open the static-protective package containing the new part until the defective part has been removed and you are ready to install the new part. Static electricity, although harmless to you, can seriously damage computer components and options.

When you handle options and other computer components, take these precautions to avoid static-electricity damage:

Limit your movement. Movement can cause static electricity to build up around you.

Always handle options and other computer components carefully. Handle PCI/PCIe cards, memory modules, system boards, and microprocessors by the edges. Never touch any exposed circuitry.

Prevent others from touching the options and other computer components.

Touch the static-protective package containing the part to a metal expansion-slot cover or other unpainted metal surface on the computer for at least two seconds. This reduces static electricity from the package and your body before you install or replace a new part.

When possible, remove the new part from the static-protective package, and install it directly in the computer without setting the part down. When this is not possible, place the static-protective package on a smooth, level surface and place the part on the package.

Do not place the part on the computer cover or other metal surface.

Service tool kit Ensure that the following common service tool kit is prepared before you service the computer.

No. Tool name Tool type

1 Phillips-head screwdriver Common tool

2 Torx-head screwdriver (for new Intel Xeon CPUs) Common tool

3 Pry tools Common tool

4 Conductive tweezers Common tool

5 Isolated tweezers Common tool

6 Hexagonal socket Common tool

7 Silicone grease Consumable tool

8 Polyamide tape Consumable tool

9 Mylar tape Consumable tool

10 Eraser Consumable tool

11 Electrical tape Consumable tool

12 Double-sided tape Consumable tool

13 Conductive tape Consumable tool

Copyright Lenovo 2022 43

Note: The silicone grease can be applied to the surfaces of the microprocessor and heat sink to eliminate air gaps. The hexagonal socket is used to pick up the antenna connectors.

Major FRUs and CRUs Your computer contains the following types of CRUs and FRUs:

Self-service CRUs: Refer to parts that can be installed or replaced easily by customer themselves or by trained service technicians at an additional cost.

Optional-service CRUs: Refer to parts that can be installed or replaced by customers with a greater skill level. Trained service technicians can also provide service to install or replace the parts under the type of warranty designated for the customers machine.

FRUs: Refer to parts that must be installed or replaced only by trained service technicians. If customers choose to replace the FRUs by themselves, the product warranty might be affected.

44 P348 Hardware Maintenance Manual

Number Description Self-service CRU Optional-service CRU

1 Computer cover Yes No

2 Screws No No

3 Heat sink and fan assembly* No Yes

4 M.2 solid-state drive* Yes No

5 M.2 solid-state drive bracket Yes No

6 Thermal pad* No No

Chapter 6. Hardware removal and installation 45

Number Description Self-service CRU Optional-service CRU

7 Coin-cell battery No Yes

8 Smart cable clip* Yes No

9 Heat sink for M.2 solid-state drive Yes No

10 Rear fan* No Yes

11 Cover presence switch cable No No

12 Cover presence switch bracket No No

13 Front and rear Wi-Fi antennas, and the cover for rear Wi-Fi antenna*

No No

14 Rear I/O shield No No

15 Optical drive cable* Yes No

16 Optical drive* Yes No

17 Optical drive bezel* Yes No

18 Optical drive bracket* Yes No

19 Graphics card plastic holder* Yes No

20 Chassis beam* Yes No

21 Storage drive converter* Yes No

22 Optical drive cage* Yes No

23 3.5-inch secondary storage drive cage* Yes No

24 Front bezel Yes No

25 Power cord Yes No

26 Keyboard* Yes No

27 Mouse* Yes No

28 2.5-inch storage drive bracket* Yes No

29 2.5-inch srorage drive cage* Yes No

30 3.5-inch primary storage drive cage Yes No

31 3.5-inch storage drive* Yes No

32 Storage drive cable* Yes No

33 3.5-inch storage drive bracket* Yes No

34 ThinkStation LED cable No No

35 ThinkStation LED cover No No

36 Power button cable No No

37 Card reader* No No

38 Front I/O bracket No No

39 Internal speaker No No

40 Front fan* No Yes

41 Thermal sensor No No

46 P348 Hardware Maintenance Manual

Number Description Self-service CRU Optional-service CRU

42 Chassis No No

43 EMI shielding* No Yes

44 Power supply assembly No Yes

45 E-lock* No Yes

46 System board No No

47 Microprocessor No No

48 Wi-Fi card shield* No No

49 Wi-Fi card* No No

50 Memory module Yes No

51 Graphics card* No Yes

52 PCI-Express card* No Yes

For detailed FRU and CRU information, such as the FRU part numbers and supported computer models, go to: http://www.lenovo.com/serviceparts-lookup

Chapter 6. Hardware removal and installation 47

System board

Item Description Item Description

1 8-pin power connector 2 Microprocessor socket

3 Microprocessor fan connector 4 Memory slot (DIMM1)

5 Memory slot (DIMM2) 6 Memory slot (DIMM3)

7 Memory slot (DIMM4) 8 ThinkStation LED connector

9 Power button board connector 10 Storage drive activity indicator

11 Internal speaker connector 12 10-pin power connector

13 SATA power connectors 14 Auxiliary fan connector 1

15 SATA connectors 16 M.2 solid-state drive Gen 3 slot

17 M.2 Wi-Fi card slot 18 Coin-cell battery

19 Thermal sensor connector 20 Front USB 2.0 connector

21 Parallel connector 22 Serial (COM2) connector

23 PCI Express x1 card slot 24 PCI Express x1 card slot

25 PCI Express x16 card slot 26 Cover presence switch connector (intrusion switch connector)

27 E-lock connector 28 System fan connector

Note: P350 supports one DIMM, two DIMMs, or four DIMMs memory configuration.

48 P348 Hardware Maintenance Manual

Internal storage drives Internal storage drives are devices that your computer uses to read and store data. You can add drives to your computer to increase storage capacity and enable your computer to read other types of media.

Item Description Function

1 3.5-inch secondary storage drive cage*

You can install a 3.5-inch storage drive in this cage or a 2.5-inch storage drive by a converter.

2 SD-card slot* You can install a supported media card into the SD-card slot.

3 3.5-inch primary storage drive cage

You can install a 3.5-inch storage drive in this cage or a 2.5-inch storage drive by a converter.

4 2.5-inch primary storage drive cage* You can install a 2.5-inch storage drive in this cage.

5 M.2 solid-state drive slot M.2 solid-state drive is installed in selected models.

* for selected models

Removing and installing hardware This section provides instructions on how to remove and install hardware for your computer. You can expand the capabilities of your computer and maintain your computer by removing or installing hardware.

Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter 1 Important safety information on page 1.

Chapter 6. Hardware removal and installation 49

External options You can connect external options to your computer, such as external speakers, a printer, or a scanner. For some external options, you must install additional software in addition to making the physical connection. When installing an external option, see Chapter 3 Product overview on page 29 to identify the required connector. Then, use the instructions that come with the option to help you make the connection and install any required software or device drivers.

Computer cover

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

For access, do the following:

1. Remove any media from the drives and turn off all connected devices and the computer.

2. Disconnect all power cords from electrical outlets and disconnect all cables from the computer.

3. Unlock any locking device that secures the computer cover.

4. Lay down the computer to place the computer cover facing up.

Removal steps

Note: If a locking device is available, use it to lock the computer.

50 P348 Hardware Maintenance Manual

Optical drive

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

For access, do the following:

1. Remove the Computer cover on page 50.

2. Disconnect the signal and power cable from the optical drive.

Replacement procedure

Chapter 6. Hardware removal and installation 51

Note: To install a new optical drive, if there is a plastic shield in the front bezel, remove the plastic shield as shown.

52 P348 Hardware Maintenance Manual

Front bezel

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

For access, remove these parts in order, if any:

Computer cover on page 50

Optical drive on page 51

.

Replacement procedure

Chapter 6. Hardware removal and installation 53

Primary storage drives

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

Attention: The internal storage drive is sensitive. Inappropriate handling might cause damage and permanent loss of data. When handling the internal storage drive, observe the following guidelines:

Replace the internal storage drive only for upgrade or repair. The internal storage drive is not designed for frequent changes or replacement.

Before replacing the internal storage drive, make a backup copy of all the data that you want to keep.

Do not touch the contact edge of the internal storage drive. Otherwise, the internal storage drive might get damaged.

Do not apply pressure to the internal storage drive.

Do not make the internal storage drive subject to physical shocks or vibration. Put the internal storage drive on a soft material, such as cloth, to absorb physical shocks.

Note: The 2.5-inch storage drive in illustrations below does not come with your computer. You can purchase one separately if you need it.

Replacement procedure of the 2.5-inch primary storage drive, bracket, and cage

1. Remove the computer cover. See Computer cover on page 50.

2. Disconnect the signal cable and the power cable from the 2.5-inch primary storage drive.

54 P348 Hardware Maintenance Manual

3. Replace the 2.5-inch primary storage drive, bracket, and cage.

4.

Chapter 6. Hardware removal and installation 55

56 P348 Hardware Maintenance Manual

Removal steps of the 3.5-inch primary storage drive and bracket

1. Remove the computer cover. See Computer cover on page 50.

2. Disconnect the signal cable and the power cable from the 3.5-inch primary storage drive.

3. Remove the 3.5-inch storage drive and bracket.

Removal steps of the 2.5-inch primary storage drive, storage drive converter, and bracket

1. Remove the computer cover. See Computer cover on page 50.

2. Disconnect the signal cable and the power cable from the 2.5-inch primary storage drive.

Chapter 6. Hardware removal and installation 57

3. Remove the 2.5-inch primary storage drive, storage drive converter, and bracket.

58 P348 Hardware Maintenance Manual

3.5-inch primary storage drive cage

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

Attention: The internal storage drive is sensitive. Inappropriate handling might cause damage and permanent loss of data. When handling the internal storage drive, observe the following guidelines:

Replace the internal storage drive only for upgrade or repair. The internal storage drive is not designed for frequent changes or replacement.

Before replacing the internal storage drive, make a backup copy of all the data that you want to keep.

Do not touch the contact edge of the internal storage drive. Otherwise, the internal storage drive might get damaged.

Do not apply pressure to the internal storage drive.

Do not make the internal storage drive subject to physical shocks or vibration. Put the internal storage drive on a soft material, such as cloth, to absorb physical shocks.

For access, remove the following parts in order, if any:

Computer cover on page 50

Optical drive on page 51

Front bezel on page 53

Primary storage drives on page 54

Removal steps

PCI-Express card

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

For access, remove Computer cover on page 50.

Chapter 6. Hardware removal and installation 59

Replacement procedure

Graphics card

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

Replacement procedure of the graphics card secured with a bracket

For access, do the following:

1. Remove these parts in order, if any:

Computer cover on page 50

Optical drive on page 51

60 P348 Hardware Maintenance Manual

Front bezel on page 53

2. Disconnect the power cable (if any) from the graphics card.

3. Replace the graphics card and bracket.

Chapter 6. Hardware removal and installation 61

Replacement procedure of the graphics card secured with a plastic holder

For access, do the following:

1. Remove the Computer cover on page 50.

2. Disconnect the power cable (if any) from the graphics card.

3. Replace the graphics card and plastic holder.

62 P348 Hardware Maintenance Manual

Chapter 6. Hardware removal and installation 63

M.2 solid-state drive and heat sink

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

Attention: The internal storage drive is sensitive. Inappropriate handling might cause damage and permanent loss of data. When handling the internal storage drive, observe the following guidelines:

64 P348 Hardware Maintenance Manual

Replace the internal storage drive only for upgrade or repair. The internal storage drive is not designed for frequent changes or replacement.

Before replacing the internal storage drive, make a backup copy of all the data that you want to keep.

Do not touch the contact edge of the internal storage drive. Otherwise, the internal storage drive might get damaged.

Do not apply pressure to the internal storage drive.

Do not make the internal storage drive subject to physical shocks or vibration. Put the internal storage drive on a soft material, such as cloth, to absorb physical shocks.

For access, remove these parts in order, if any:

Computer cover on page 50

2.5-inch primary hard disk drive cage. See Primary storage drives on page 54

Removal steps

M.2 solid-state drive bracket

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

For access, remove these parts in order, if any:

Computer cover on page 50

2.5-inch primary hard disk drive cage. See Primary storage drives on page 54

M.2 solid-state drive and heat sink on page 64

Chapter 6. Hardware removal and installation 65

Replacement procedure

Optical drive cage

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

For access, do the following:

1. Remove these parts in order, if any:

Computer cover on page 50

Optical drive on page 51

Front bezel on page 53

2. Disconnect the signal cable and power cable from the 3.5-inch secondary hard disk drive under the optical drive cage.

66 P348 Hardware Maintenance Manual

Replacement procedure

Chapter 6. Hardware removal and installation 67

Secondary storage drive

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

Attention: The internal storage drive is sensitive. Inappropriate handling might cause damage and permanent loss of data. When handling the internal storage drive, observe the following guidelines:

Replace the internal storage drive only for upgrade or repair. The internal storage drive is not designed for frequent changes or replacement.

Before replacing the internal storage drive, make a backup copy of all the data that you want to keep.

Do not touch the contact edge of the internal storage drive. Otherwise, the internal storage drive might get damaged.

Do not apply pressure to the internal storage drive.

Do not make the internal storage drive subject to physical shocks or vibration. Put the internal storage drive on a soft material, such as cloth, to absorb physical shocks.

For access, remove these parts in order, if any:

Computer cover on page 50

Optical drive on page 51

Front bezel on page 53

Optical drive cage on page 66

68 P348 Hardware Maintenance Manual

Removal steps of the 3.5-inch secondary storage drive, bracket, and cage

Removal steps of the 2.5-inch primary storage drive, storage drive converter, and bracket

1. Remove the computer cover. See Computer cover on page 50.

2. Disconnect the signal cable and the power cable from the 2.5-inch primary storage drive.

Chapter 6. Hardware removal and installation 69

3. Remove the 2.5-inch primary storage drive, storage drive converter, and bracket.

Front fan

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

70 P348 Hardware Maintenance Manual

For access, do the following:

1. Remove these parts in order, if any:

Computer cover on page 50

Optical drive on page 51

Front bezel on page 53

2. Disconnect the front fan cable from the front fan connector on the system board.

Replacement procedure

Note: The front fan is attached to the chassis by four rubber mounts. Break or cut the rubber mounts and gently pull the front fan out of the chassis.

Rear fan

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

Chapter 6. Hardware removal and installation 71

For access, do the following:

1. Remove the computer cover. See Computer cover on page 50

2. Disconnect the rear fan cable from the rear fan connector on the system board.

Replacement procedure

Note: The rear fan is attached to the chassis by four rubber mounts. Gently pull the rear fan out of the chassis.

72 P348 Hardware Maintenance Manual

Heat-sink-and-fan assembly

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

The heat sink might be very hot. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

For access, do the following:

1. Remove these parts in order, if any:

Computer cover on page 50

Optical drive on page 51

Front bezel on page 53

Optical drive cage on page 66

2. Disconnect the heat-sink-and-fan assembly cable from the microprocessor fan connector on the system board.

Replacement procedure

1. Follow the following sequence to loosen the four screws that secure the heat-sink-and-fan assembly to the system board. Then, lift the heat-sink-and-fan assembly off the system board.

Partially loosen screw 1a , fully loosen screw 1b , and then fully loosen screw 1a .

Partially loosen screw 1c , fully loosen screw 1d , and then fully loosen screw 1c .

Notes:

Carefully loosen the four screws to avoid any possible damage to the system board. The four screws cannot be removed from the heat-sink-and-fan assembly.

You might have to gently twist the heat-sink-and-fan assembly to free it from the microprocessor.

Do not touch the thermal grease while handling the heat-sink-and-fan assembly.

Chapter 6. Hardware removal and installation 73

2. Position the heat-sink-and-fan assembly on the system board. Ensure that the four screws are aligned with the holes in the system board. Follow the following sequence to tighten the four screws to secure the new heat-sink-and-fan assembly. Do not over-tighten the screws.

Partially tighten screw 2a , fully tighten screw 2b , and then fully tighten screw 2a .

Partially tighten screw 2c , fully tighten screw 2d , and then fully tighten screw 2c .

Notes:

Apply appropriate amount of thermal grease to the new heat-sink-and-fan assembly.

Ensure that the heat-sink-and-fan assembly cable is toward the microprocessor fan connector on the system board.

74 P348 Hardware Maintenance Manual

Chassis beam

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

For access, remove these parts in order, if any:

Computer cover on page 50

Optical drive on page 51

Front bezel on page 53

Remove the plastic holder. See Graphics card on page 60

Optical drive cage on page 66

Chapter 6. Hardware removal and installation 75

Replacement procedure

76 P348 Hardware Maintenance Manual

Memory module

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

Ensure that you follow the installation order for memory modules shown in the following illustration.

For access, remove these parts in order, if any:

Computer cover on page 50

Chapter 6. Hardware removal and installation 77

Optical drive on page 51

Front bezel on page 53

Optical drive cage on page 66

Replacement procedure

Note: During the installation, ensure that you align the memory module to the slot and press down on both ends until the latches are fully engaged with a click.

Coin-cell battery

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

Your computer has a special type of memory that maintains the date, time, and settings for built-in features, such as parallel connector assignments (configurations). A coin-cell battery keeps this information active when you turn off the computer.

The coin-cell battery normally requires no charging or maintenance throughout its life; however, no coin-cell battery lasts forever. If the coin-cell battery fails, the date and time information is lost. An error message is displayed when you turn on the computer.

To dispose of the coin-cell battery, refer to the Lithium coin-cell battery notice in the Safety and Warranty Guide.

For access, remove these parts in order, if any:

Computer cover on page 50

Optical drive on page 51

Front bezel on page 53

78 P348 Hardware Maintenance Manual

Optical drive cage on page 66

Removal steps

Note: After installing a new coin-cell battery, reset the system date and time in the UEFI BIOS menu.

Power supply assembly

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

Although there are no moving parts in the computer after the power cord has been disconnected, the following warnings are required for your safety.

Keep fingers and other parts of your body away from hazardous, moving parts. If you suffer an injury, seek medical care immediately.Never remove the cover on a power supply or any part that has the following label attached.

Hazardous voltage, current, and energy levels are present inside any component that has this label attached. There are no serviceable parts inside these components. If you suspect a problem with one of these parts, contact a service technician.

For access, do the following:

1. Remove these parts in order, if any:

Computer cover on page 50

Chapter 6. Hardware removal and installation 79

Optical drive on page 51

Front bezel on page 53

Primary storage drives on page 54

3.5-inch primary storage drive cage on page 59

2. Disconnect the power supply assembly cables from the system board.

Removal steps

E-lock

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

For access, do the following:

1. Remove the Computer cover on page 50.

2. Disconnect the E-lock cable from the system board.

Note: To remove the screws, you need a special tool (T15 star wrench).

80 P348 Hardware Maintenance Manual

Replacement procedure

Front I/O bracket, power button cable, and card reader

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

For access, do the following:

1. Remove these parts in order, if any: Computer cover on page 50 Optical drive on page 51 Front bezel on page 53 Optical drive cage on page 66

2. Disconnect the power button cable from the system board.

3. Disconnect the card reader cable from the card reader.

Chapter 6. Hardware removal and installation 81

Replacement procedure

82 P348 Hardware Maintenance Manual

Internal speaker

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

For access, do the following:

1. Remove these parts in order, if any: Computer cover on page 50 Optical drive on page 51 Front bezel on page 53 Optical drive cage on page 66

2. Disconnect the internal speaker cable from the system board.

Removal steps

Wi-Fi card

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

For access, remove Computer cover on page 50.

Chapter 6. Hardware removal and installation 83

Removal steps

Front Wi-Fi antenna

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

For access, remove these parts in order, if any: Computer cover on page 50 Optical drive on page 51 Front bezel on page 53 Wi-Fi card on page 83

Removal steps

Rear Wi-Fi antenna

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

84 P348 Hardware Maintenance Manual

For access, remove these parts in order if any: Computer cover on page 50 Wi-Fi card on page 83

Replacement procedure

Chapter 6. Hardware removal and installation 85

ThinkStation LED

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

For access, do the following:

1. Remove these parts in order if any: Computer cover on page 50 Optical drive on page 51 Front bezel on page 53

2. Disconnect the ThinkStation LED cable from the system board.

86 P348 Hardware Maintenance Manual

Removal steps

Thermal sensor

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

For access, do the following:

1. Remove these parts in order if any: Computer cover on page 50 Optical drive on page 51 Front bezel on page 53 Front fan on page 70

2. Disconnect the thermal sensor cable from the system board.

Chapter 6. Hardware removal and installation 87

Removal steps

Cover presence switch cable and bracket

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

For access, do the following:

1. Remove Computer cover on page 50.

2. Disconnect the cover presence switch cable from the system board.

88 P348 Hardware Maintenance Manual

Removal steps

Microprocessor

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

The heat sink and microprocessor might be very hot. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

For access, remove these parts in order, if any: Computer cover on page 50 Optical drive on page 51 Front bezel on page 53 Optical drive cage on page 66 Heat-sink-and-fan assembly on page 73

Notes:

Touch only the edges of the microprocessor. Do not touch the gold contacts on the bottom.

Do not drop anything onto the microprocessor socket while it is exposed. The socket pins must be kept as clean as possible.

Chapter 6. Hardware removal and installation 89

Removal steps

System board

Prerequisite

Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

The heat sink and microprocessor might be very hot. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

Notes:

Your microprocessor sockets and socket covers might look slightly different from the illustrations in this topic.

Do not touch the pins on the microprocessor socket or the gold contacts on the microprocessor.

For access, do the following:

1. Remove these parts in order, if any: Computer cover on page 50 Optical drive on page 51 Front bezel on page 53 Primary storage drives on page 54 PCI-Express card on page 59 Graphics card on page 60 Heat-sink-and-fan assembly on page 73 Optical drive cage on page 66

90 P348 Hardware Maintenance Manual

Front fan on page 70 Rear fan on page 71 Heat-sink-and-fan assembly on page 73 Chassis beam on page 75 Memory module on page 77 Coin-cell battery on page 78 E-lock on page 80 Front I/O bracket, power button cable, and card reader on page 81 Internal speaker on page 83 Wi-Fi card on page 83 Cover presence switch cable and bracket on page 88 Microprocessor on page 89

2. Record the cable routing and cable connections, and then disconnect all cables from the system board. See System board on page 48.

Removal steps

Note: The failing system board must be returned with a microprocessor socket cover to protect the pins during shipping and handling.

Microprocessor socket cover installation procedure

1. After you have removed the microprocessor from the failing system board, close the microprocessor retainer. Then, put the lever to the locked position to secure the retainer in place.

2. Note the orientation of the socket cover, and install one side of the socket cover into the microprocessor socket. Carefully press the other side of the socket cover downward until the socket cover snaps into position.

Note: The microprocessor socket cover might look slightly different from the illustration.

Chapter 6. Hardware removal and installation 91

3. Carefully check the four corners of the socket cover to ensure that the cover is seated securely.

4. Follow any additional instructions that are included with the replacement part you received.

92 P348 Hardware Maintenance Manual

Chapter 7. Notices and trademarks Notices

Lenovo may not offer the products, services, or features discussed in this document in all countries. Consult your local Lenovo representative for information on the products and services currently available in your area. Any reference to a Lenovo product, program, or service is not intended to state or imply that only that Lenovo product, program, or service may be used. Any functionally equivalent product, program, or service that does not infringe any Lenovo intellectual property right may be used instead. However, it is the user's responsibility to evaluate and verify the operation of any other product, program, or service.

Lenovo may have patents or pending patent programs covering subject matter described in this document. The furnishing of this document does not give you any license to these patents. You can send license inquiries, in writing, to:

Lenovo (United States), Inc. 8001 Development Drive Morrisville, NC 27560 U.S.A. Attention: Lenovo Director of Licensing

LENOVO PROVIDES THIS PUBLICATION "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some jurisdictions do not allow disclaimer of express or implied warranties in certain transactions, therefore, this statement may not apply to you.

Changes are made periodically to the information herein; these changes will be incorporated in new editions of the publication. To provide better service, Lenovo reserves the right to improve and/or modify the products and software programs described in the manuals included with your computer, and the content of the manual, at any time without additional notice.

The software interface and function and hardware configuration described in the manuals included with your computer might not match exactly the actual configuration of the computer that you purchase. For the configuration of the product, refer to the related contract (if any) or product packing list, or consult the distributor for the product sales. Lenovo may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you.

The products described in this document are not intended for use in implantation or other life support applications where malfunction may result in injury or death to persons. The information contained in this document does not affect or change Lenovo product specifications or warranties. Nothing in this document shall operate as an express or implied license or indemnity under the intellectual property rights of Lenovo or third parties. All information contained in this document was obtained in specific environments and is presented as an illustration. The result obtained in other operating environments may vary.

Lenovo may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you.

Any references in this publication to non-Lenovo Web sites are provided for convenience only and do not in any manner serve as an endorsement of those Web sites. The materials at those Web sites are not part of the materials for this Lenovo product, and use of those Web sites is at your own risk.

Any performance data contained herein was determined in a controlled environment. Therefore, the result obtained in other operating environments may vary significantly. Some measurements may have been made

Copyright Lenovo 2022 93

on development-level systems and there is no guarantee that these measurements will be the same on generally available systems. Furthermore, some measurements may have been estimated through extrapolation. Actual results may vary. Users of this document should verify the applicable data for their specific environment.

This document is copyrighted by Lenovo and is not covered by any open source license, including any Linux agreement(s) which may accompany software included with this product. Lenovo may update this document at any time without notice.

For the latest information or any questions or comments, contact or visit the Lenovo Web site: https://pcsupport.lenovo.com

Trademarks

LENOVO, LENOVO logo, THINKSTATION, and THINKSTATION logo are trademarks of Lenovo. Intel is a trademark of Intel Corporation or its subsidiaries in the U.S. and/or other countries. Microsoft and Windows are trademarks of the Microsoft group of companies. DisplayPort is a trademark of the Video Electronics Standards Association. Wi-Fi is a registered trademark of Wi-Fi Alliance. All other trademarks are the property of their respective owners.

94 P348 Hardware Maintenance Manual

Manualsnet FAQs

If you want to find out how the ThinkStation P348 Lenovo works, you can view and download the Lenovo ThinkStation P348 Workstation Hardware Maintenance Manual on the Manualsnet website.

Yes, we have the Hardware Maintenance Manual for Lenovo ThinkStation P348 as well as other Lenovo manuals. All you need to do is to use our search bar and find the user manual that you are looking for.

The Hardware Maintenance Manual should include all the details that are needed to use a Lenovo ThinkStation P348. Full manuals and user guide PDFs can be downloaded from Manualsnet.com.

The best way to navigate the Lenovo ThinkStation P348 Workstation Hardware Maintenance Manual is by checking the Table of Contents at the top of the page where available. This allows you to navigate a manual by jumping to the section you are looking for.

This Lenovo ThinkStation P348 Workstation Hardware Maintenance Manual consists of sections like Table of Contents, to name a few. For easier navigation, use the Table of Contents in the upper left corner.

You can download Lenovo ThinkStation P348 Workstation Hardware Maintenance Manual free of charge simply by clicking the “download” button in the upper right corner of any manuals page. This feature allows you to download any manual in a couple of seconds and is generally in PDF format. You can also save a manual for later by adding it to your saved documents in the user profile.

To be able to print Lenovo ThinkStation P348 Workstation Hardware Maintenance Manual, simply download the document to your computer. Once downloaded, open the PDF file and print the Lenovo ThinkStation P348 Workstation Hardware Maintenance Manual as you would any other document. This can usually be achieved by clicking on “File” and then “Print” from the menu bar.