Lenovo ThinkCentre A50 Hardware Maintenance Manual

Lenovo ThinkCentre A50 Manual

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  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 1
    Hardware Maintenance Manual Types 8086, 8087, 8088, 8089 Types 8090, 8094
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 2
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 3
    Hardware Maintenance Manual Types 8086, 8087, 8088, 8089 Types 8090, 8094
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 4
    product it supports, be sure to read the information under "Notices," on page 155. Sixth Edition (March 2008) © Copyright Lenovo 2005, 2008. Portions © Copyright International Business Machines Corporation 2005. All rights reserved. LENOVO products, data, computer software, and services have been
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    startup device 56 © Lenovo 2005, 2008. Portions © IBM Corp. 2005. Selecting a temporary startup device . . . . . 56 Changing the startup device sequence . . . . 56 Advanced settings 56 Chapter 7. Symptom-to-FRU Index . . . 57 Hard disk drive boot error 57 Power Supply Errors 57 Diagnostic error
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    and power interface (ACPI) BIOS Automatic Power-On features Recovering software using the Rescue and Recovery program Starting the Rescue and Recovery workspace . 152 . 152 . 153 153 Appendix. Notices 155 Television output notice 156 Trademarks 156 iv Hardware Maintenance Manual
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    . Before servicing a Lenovo product, be sure to read the Safety Information. See Chapter 2, "Safety information," on page 5. The Symptom-to-FRU Index and Additional Service Information chapters are not specific to any machine type and are applicable to all ThinkCentre computers. This manual includes
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    Lenovo type (MT) and 3-digit model, where model = 'CTO' (Example: 8129-CTO). Custom Model Variant (CMV) This is a unique configuration that has been negotiated between Lenovo CTO and CMV machine type models (Example: 8129- to support CTO, LCDs), and memory. v Remember http://w3-3.ibm.com/pc/entitle
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    browser to http://www.lenovo.com/think/support. 2. Type the machine type (Example: 8129) in the Use Quick Path field; then click Go. 3. Under Browse by product, click Continue. 4. Under Important information, click Parts information. 5. In the Refine results field, select Service parts; then click
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    to be ready to support Lenovo's requirements and schedule. Products sold in 2005, will contain some RoHS compliant FRUs. The following statement pertains to these products and any product Lenovo produces containing RoHS compliant parts. RoHS compliant ThinkCentre parts have unique FRU part
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    be familiar with before servicing a computer. General start the machine, ensure that other service representatives and the customer's personnel place, away from all personnel, while you are servicing the machine. v Keep your tool case away to your eyes. v After service, reinstall all safety shields,
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    type of mat to protect yourself from electrical shock. v Find the room emergency power power before: - Performing a mechanical inspection - Working near power supplies off the power, if necessary. - Use only one hand when working with powered-on electrical high voltages; these instructions are in the
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    service the following parts with the power on when they are removed from their normal operating places in a machine: - Power supply guide. problem. Consider these conditions and the safety hazards they present: v Electrical hazards, especially primary power power cord should be the appropriate type
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    for worn, frayed, or pinched cables. 8. Check that the power-supply cover fasteners (screws or rivets) have not been removed or such as those listed below, to provide protection that meets the specific service requirement. Note: The use of a grounding system is desirable Hardware Maintenance Manual
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    when there is evidence of fire, water, or structural damage. v 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. v Connect and disconnect cables as
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    containing a lithium battery, replace it only with the same module type made by the same manufacturer. The battery contains lithium and result in exposure to hazardous laser radiation. There are no serviceable parts inside the device. v Use of controls or adjustments 10 Hardware Maintenance Manual
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    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. 2 1 CAUTION: Do
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    12 Hardware Maintenance Manual
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    Chapter 2. Safety information 13
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    ≥18 kg (37 lbs) ≥32 kg (70.5 lbs) ≥55 kg (121.2 lbs) 2 1 14 Hardware Maintenance Manual
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    PERIGO A corrente elétrica proveniente de cabos de alimentação, de telefone e de comunicações é perigosa. Para evitar risco de choque elétrico: v Não conecte nem desconecte nenhum cabo ou execute instalação, manutenção ou reconfiguração deste produto durante uma tempestade com raios. v Conecte
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    ao feixe. ≥18 kg (37 lbs) ≥32 kg (70.5 lbs) ≥55 kg (121.2 lbs) CUIDADO: Utilize procedimentos de segurança para levantar equipamentos. 16 Hardware Maintenance Manual
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    CUIDADO: O botão de controle de alimentação do dispositivo e o botão para ligar/desligar da fonte de alimentação não desligam a corrente elétrica fornecida ao dispositivo. O dispositivo também pode ter mais de um cabo de alimentação. Para remover toda a corrente elétrica do dispositivo, assegure que
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    18 Hardware Maintenance Manual
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    2 1 Chapter 2. Safety information 19
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    20 Hardware Maintenance Manual
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    Chapter 2. Safety information 21
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    2 1 22 Hardware Maintenance Manual
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    , que vous déplacez, ou que vous manipulez le présent produit ou des périphériques qui lui sont raccordés, reportez-vous aux instructions ci-dessous pour connecter et déconnecter les différents cordons. Connexion Déconnexion 1. Mettez les unités HORS TENSION. 2. Commencez par brancher tous les
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 30
    au lithium usagée par une pile de référence identique exclusivement, (référence 33F8354), ou suivre les instructions du fabricant qui en définit les équivalences. Si votre système est doté d'un module le faisceau ou del'observer à l'aide d'instruments optiques. 24 Hardware Maintenance Manual
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    ≥18 kg (37 lbs) ≥32 kg (70.5 lbs) ≥55 kg (121.2 lbs) ATTENTION: Soulevez la machine avec précaution. ATTENTION: L'interrupteur de contrôle d'alimentation de l'unité et l'interrupteur dubloc d'alimentation ne coupent pas le courant électrique alimentantl'unité. En outre, le système peut être équipé
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    Sie zuerst alle Netzkabel aus den Netzsteckdosen. 3. Ziehen Sie die Signalkabel aus den Buchsen. 4. Ziehen Sie alle Kabel von den Einheiten ab. 26 Hardware Maintenance Manual
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    CAUTION: Eine verbrauchte Lithiumbatterie nur durch eine Batterie mit der Teilenummer 33F8354 oder eine gleichwertige, vom Hersteller empfohlene Batterie ersetzen. Enthält das System ein Modul mit einer Lithiumbatterie, dieses nur durch ein Modul desselben Typs und von demselben Hersteller ersetzen.
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    Netzkabel vom Netz getrennt werden. 2 1 ACHTUNG: Legen Sie auf in einem Rack montierten Einheiten keine über 82 kg schweren Gegenstände ab. 28 Hardware Maintenance Manual
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    Chapter 2. Safety information 29
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    30 Hardware Maintenance Manual
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    2 1 Chapter 2. Safety information 31
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    l'unità. 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 unità. 32 Hardware Maintenance Manual
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    vi sono parti su cui effettuare l'assistenza tecnica. v L'utilizzo di controlli, regolazioni o l'esecuzione di procedure non descritti nel presente manuale possono provocare l'esposizione a radiazioni pericolose. PERICOLO Alcune unità laser contengono un diodo laser di Classe 3A o Classe 3B. Tener
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    di alimentazione. 2 1 ATTENZIONE: Non collocare oggetti che pesano più di 82 kg (180 lb.) sulla parte superiore delle unità montante nel rack. 34 Hardware Maintenance Manual
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    Chapter 2. Safety information 35
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    2 1 36 Hardware Maintenance Manual
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    Chapter 2. Safety information 37
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    alimentación de las tomas de corriente. 3. Desconecte los cables de señal de los conectores. 4. Desconecte todos los cables de los dispositivos. 38 Hardware Maintenance Manual
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    PRECAUCIÓN: Cuando sustituya una batería de litio, utilice solamente una batería número de pieza 33F8354 u otra de tipo equivalente recomendada por el fabricante. Si su sistema dispone de un módulo que contiene una batería de litio, reemplácelo sólo con el mismo tipo de módulo, del mismo fabricante.
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    toma de corriente. 2 1 PRECAUCIÓN: No coloque ningún objeto que pese más de 82 Kg (180 lb) encima de dispositivos montados en un bastidor. 40 Hardware Maintenance Manual
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    and installation instructions v Publications v Troubleshooting information v Parts information v Downloads and drivers v Links to other useful sources of information To access this information, point your browser to http://www.lenovo.com/think/ support/. © Lenovo 2005, 2008. Portions © IBM Corp
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    specifications noise-emission values Average sound-pressure levels: At operator Declared (upper limit) sound-power levels: Idle: 4.0 sound-pressure levels in a given location might exceed the average values stated because of room reflections and other nearby noise sources. The declared sound-power
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 49
    of the computer and two diagnostic LEDs are located on the power supply at the rear of the computer. a. Disconnect the power cord from the electrical outlet. b. Reconnect the power cord to a working electrical outlet. c. Press the power button. © Lenovo 2005, 2008. Portions © IBM Corp. 2005. 43
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    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. v Machine type and model v Processor or hard disk upgrades v Failure symptom - Do
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    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/ software set-up between ″working and non-working″ systems will often lead to problem resolution. Chapter 4. General Checkout 45
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    46 Hardware Maintenance Manual
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    www.lenovo.com/think/support on the World Wide Web. Type your machine type into the Use Quick path field and click Go to find the downloadable files that are specific to the computer. See "Diagnostics program download" on page 48. Diagnostic error messages appear when a test program finds a problem
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    Note: If your computer has no internal diskette drive, an external USB diskette drive is required when using the diagnostic diskette. 1. If ://www.lenovo.com/think/support. v Type the machine type in the ″Use Quick Path″ field and click Go. v Click Downloads and drivers and Maintenance Manual
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    results produce the following error code format: Function Code Failure Type DeviceID Date ChkDigits Text v Function Code: Represents the feature or user specific configuration parameters located in the FDAT.INI. FDAT uses information supplied by these features to indicate specifically what
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    down of the drive platters to avoid damaging the media. v Manufacturer Log - an in-depth manufacturer supported log of errors on the drive. Multitasking: To allow simultaneous testing of multiple hard drives whenever possible, can access the UDMA channel and the UDMA 50 Hardware Maintenance Manual
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    : v Quick Erase Hard Drive v Full Erase Hard Drive The Quick Erase Hard Drive provides a DOS utility that performs the following: v Destroys the Master Boot Record (MBR) on the hard drive. v Destroys all copies of the FAT Table on all partitions (both the master and backup). v Destroys the partition
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    toolbar and press Enter. 2. Select either the QUICK ERASE or FULL ERASE HARD DISK option and follow the instructions. Viewing the test log Errors reported by the diagnostic test will be displayed by the program as a failed to diskette or press F2 to print the file. 52 Hardware Maintenance Manual
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    erasable programmable read-only memory (EEPROM) of the type your password. See "Using passwords" for more information. b. BIOS settings cannot be changed without the correct password. c. The Setup Utility might start automatically when the power Lenovo 2005, 2008. Portions © IBM Corp. 2005. 53
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    unless that computer also supports the IDE Drive User Password. v If your computer is connected to a local area network (LAN), Wake on LAN® will not work hard disk drive(s). When this password is set, you are prompted to type a valid password before any hard disk drive can be used. This prompt Manual
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    Attention Make sure that the IDE Drive Master password is stored in a safe place. If both the IDE Drive User password and the IDE Drive Master password are lost or forgotten, the IDE hard disk drive must be replaced. If both the IDE Drive User Password and the IDE Drive Master Password are to be
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 62
    device Use this procedure to startup from any boot device. Note: Not all CDs, hard Windows XP, the computer performance might be degraded. Therefore, you should always set HyperThreading to Disabled unless you are sure your operating system supports HyperThreading. 56 Hardware Maintenance Manual
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 63
    v On/Off Switch Power Supply connector v System Board Power Supply connectors v Microprocessor(s) connection Check the power cord for continuity. Check the power-on switch for continuity. FRU/Action Reseat connectors Power Cord Power-on Switch © Lenovo 2005, 2008. Portions © IBM Corp. 2005. 57
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    replace the power supply. OFF Replace the system board ON ON Replace the power supply If the Diagnostic LEDs are in the normal condition and the problem persists, replace the system board and the microprocessor, one at a time, until the computer works correctly. 58 Hardware Maintenance Manual
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    " on page 48 for the specific type for information about the Diagnostic programs. In the following index, X can represent any number. Diagnostic Error Code 000-000-XXX BIOS Test Passed 000-002-XXX BIOS Timeout 000-024-XXX BIOS Addressing test failure 000-025-XXX BIOS Checksum Value error 000-026
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    Manual FRU/Action 1. Flash the system. See "Flash update procedures" on page 150 2. System board Information only Re-start the test, if necessary 1. Press F3 to review . See "Flash update procedures" on page 150 3. Go to "Undetermined problems" on page 88 1. Go to "Undetermined problems" on page 88
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    System board 1. Flash the system. See "Flash update procedures" on page 150 2. System board 1. Power-off/on system and re-test 2. System board 1. Power-off/on system and re-test 2. System board Information only Re-start the test, if necessary 1. Press F3 to review the log file 2. Re-start the test
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    001-278-XXX System IRQ11 failure 001-279-XXX System IRQ12 failure 001-280-XXX System IRQ13 failure 62 Hardware Maintenance Manual FRU/Action 1. Go to "Undetermined problems" on page 88 2. Flash the system and re-test 3. Replace component under function test System board System board System board
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    , if installed 2. System board 1. Video card, if installed 2. System board 1. Video Ram 2. Video card, if installed 3. System board 1. Video card, if installed 2. System board 1. Video card, if installed 2. System board 1. Run Setup 2. Video drivers update 3. Video card, if installed 4. System board
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    Go to "Undetermined problems" on page 88 2. Flash the system and re-test. See "Flash update procedures" on page 150 3. Replace component under function test 1. Video card, if installed 2. System board No action 1. Diskette drive Cable 2. Diskette drive 3. System board 64 Hardware Maintenance Manual
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    196-XXX Diskette interface test halt, error threshold exceeded 1. Press F3 to review the log file 2. Re-start the test to reset the log file test. See "Flash update procedures" on page 150 3. Go to "Undetermined problems" on page 88 006-199-XXX 1. Go to "Undetermined problems" on page Diskette
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    test, if necessary 011-196-XXX 1. Press F3 to review the log file Serial port test halt, error threshold Go to "Undetermined problems" on page 88 2. Flash the system and re-test. See "Flash update procedures" on page update procedures" on page 150 3. System board 66 Hardware Maintenance Manual
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    150 3. Go to "Undetermined problems" on page 88 1. Go to "Undetermined problems" on page 88 2. Flash the system and re-test. See "Flash update procedures" on page 150 3. Replace component under function test 1. External parallel device 2. System board No action 1. Remove USB device(s) and re-test
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    150 3. Run memory test 4. System board 1. Remove USB device(s) and re-test 2. System board System board 1. Run setup and check for conflicts 2. Flash the system. See "Flash update procedures" on page 150 3. System board Information only Re-start the test, if necessary 1. Press F3 to review the log
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    problems" on page 88 2. Flash the system and re-test. See "Flash update procedures" on page 150 3. Replace component under function test 018-250-XXX PCI Card Services 020-196-XXX PCI test halt, error threshold exceeded 1. Press F3 to review the log file 2. Re-start the test to reset the log file
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    warning 70 Hardware Maintenance Manual FRU/Action 1. If problems" on page 88 2. Flash the system and re-test. See "Flash update procedures" on page 150 3. Replace component under function test 1. PCI card 2. Riser card, if installed 3. System board No action 1. IDE signal cable 2. Check power supply
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    on page 150 3. Go to "Undetermined problems" on page 88 1. Go to "Undetermined problems" on page 88 2. Flash the system and re-test. See "Flash update procedures" on page 150 3. Replace component under function test No action 1. SCSI signal cable 2. Check power supply 3. SCSI device 4. SCSI adapter
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    -XXX RAID interface test failed, cause unknown 071-000-XXX Audio port Interface Test Passed FRU/Action 1. If a component is called update procedures" on page 150 3. Go to "Undetermined problems" on page 88 1. Go to "Undetermined problems" on page 88 2. Flash the system and re-test. See "Flash update
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 79
    " on page 150 3. Go to "Undetermined problems" on page 88 1. See "Undetermined problems" on page 88 2. Flash the system and re-test. See "Flash update procedures" on page 150 3. Replace component under function test 1. Speakers 2. Audio card, if installed 3. System board No action 1. Remove
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    to review the and re-test. See "Flash update procedures" on page 150 3. Go to "Undetermined problems" on page 88 080-199-XXX "Undetermined problems" on page 88 2. Flash the system and re-test. See "Flash update procedures" review the log file 2. Re-start the test to reset
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    88 1. See "Undetermined problems" on page 88 2. Flash the system and re-test. See "Flash update procedures" on page 150 3. Replace component under function test No action 1. Microprocessor(s) 2. System board Information only Re-start the test, if necessary 1. Press F3 to review the log file 2. Re
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 82
    review update procedures" on page 150 3. Go to "Undetermined problems" problems" on page 88 2. Flash the system and re-test. See "Flash update procedures" on page 150 3. Replace component under function test 170-250-XXX 170-251-XXX Voltage Sensor(s) Voltage limit error 1. Power supply
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    201-000-XXX System Memory Test Passed 201-XXX-XXX System Memory error 202-000-XXX problems" on page 88 1. See "Undetermined problems" on page 88 2. Flash the system and re-test. See "Flash update procedures" on page 150 3. Replace component under function test 1. Check fans 2. Check Power supply
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    action 1. CD-ROM Drive Cable 2. Check power supply voltages 3. CD-ROM drive 4. System board No action 1. Hard Disk Drive Cable 2. Check power supply voltages 3. Reseat the hard disk drive cable Run Setup to enable DDC 2. Cable 3. Monitor 4. Video card 5. System board 78 Hardware Maintenance Manual
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    Diagnostic Error Code 415-000-XXX Modem Test Passed 415-XXX-XXX Modem error FRU/Action No action Remove the Modem and re-test the system Chapter 7. Symptom-to-FRU Index 79
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    series of short tones separated by pauses (intervals without sound). See the following examples. Beeps 1-2-X 4 Description write error 1-2-2-3 ROM BIOS check error 1-2-1 failed 2-2-3 CMOS power failure and checksum Memory module 2. System Board 1. Memory module 2. System Board 1. Memory
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    Beep Symptom 2-2-4 CMOS configuration info validation failed 2-3-1 Screen initialization failed 2-3-2 Screen memory failed 2-3-3 Screen retrace failed 1-2 Search for video ROM failed All other beep code sequences Continuous beep Repeating short beeps FRU/Action 1. Battery 2. System Board 1. Jumper
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    symptoms Symptom/Error No beep during POST but computer works correctly. No beep during POST. FRU/Action System board 1. See "Undetermined problems" on page 88. 2. System Board 3. Memory Module 4. Any Adapter or Device 5. Riser Card 6. Power Cord 7. Power Supply 82 Hardware Maintenance Manual
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    number. POST Error Code 162 Configuration error 164 Memory Size Error 166 Boot Block Check Sum Error 167 No Processor BIOS update found 175 Primary Copy of Secure Data is damaged 176 The System has been tampered with 179 Boot Integrity Services Segment Error 184 Asset Control Antenna not detected
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    If problem persists, replace the system board 201 Memory error 1. Run Enhanced Diagnostics Memory Test 2. Memory module If problem persists, replace the system board 662 Configuration Change has occurred Diskette drive configuration error or wrong diskette drive type; run Maintenance Manual
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    Adapter 1804 PCI/PnP Error! Not Enough Real Memory Space Available 1. Run Setup and verify PCI/ISA PCI Adapter 1962 No operating system found Press F1 to repeat boot sequence. 5962 An IDE device (other than hard drive) problem persists, replace the system board Chapter 7. Symptom-to-FRU
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    address) 1. Power Supply 2. System Board 3. Riser card 1. Diskette Drive 2. System Board 3. Diskette Drive Cable 4. Riser card 1. System Board 2. Primary Hard Disk Drive 3. Hard Disk Drive Cable 4. Riser card 1. Run the Memory tests 2. Memory Module 3. System Board 86 Hardware Maintenance Manual
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    2. System Board No power or fan not running 1. See "Power Supply Errors" on page 57. Non-system disk or disk error-type message with a known- Power-on indicator or hard disk drive in-use 1. Power Supply light not on, but computer works correctly 2. System Board 3. LED Cables Printer problems
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    e. Extended video memory f. External Cache g. External Cache RAM h. Hard disk drive i. Diskette drive 3. Power-on the computer to re-test 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
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    you work safely. FRU replacements are to be done by trained service technicians only. This chapter does not contain a remove and replace USB connectors on the front of the computer. 1 Headphone connector 2 Microphone connector 3 USB connector 4 USB connector © Lenovo 2005, 2008. Portions © IBM
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    4 Keyboard connector 5 VGA monitor connector 6 Parallel connector 7 Serial connector 8 Ethernet connector 9 USB connectors 10 Audio line out connector 11 Audio line in connector 12 USB connectors 13 Power supply diagnostic LEDs 14 Power connector Opening the cover Important Read Chapter 2, "Safety
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    Locating components The following illustration will help you locate the various components in the computer. 1 PCI riser 2 Power supply assembly 3 Optical drive eject button 4 Optical drive 5 Hard disk drive 6 Cable clip on PCI riser 7 Rear fan bracket assembly Chapter 8. Replacing FRUs 91
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    4 12v power connector 5 Power connector 6 Front fan connector 7 Microprocessor 8 Speaker connector 9 Memory connector 1 10 Memory connector 2 Removing and replacing a memory module 1. Open the cover. See "Opening the cover" on page 90. 2. Locate the memory connectors. See "Identifying parts
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 99
    the socket. Insert the memory module straight down into the connector until it snaps into position and the retaining clips are closed. 5. Go to "Completing the FRU replacement." on page 104. Removing and replacing a PCI adapter This section provides information and instructions for replacing a PCI
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    translations)" on page 9 for information about replacing and disposing of the battery. 1. Open the cover. See "Opening the cover" on page 90. 94 Hardware Maintenance Manual
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    2. Pivot the drive bay assembly upward to gain access to the system board. 3. Locate the rear fan bracket assembly. See "Locating components" on page 91. 4. Lift the rear fan bracket assembly up to gain access to the battery. 5. Remove the old battery. 6. Install the new battery. 7. Replace the rear
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 102
    93. 3. Disconnect all power supply cables from the drives. 4. Disconnect all power supply cables from the system board. See "Identifying parts on the system board" on page 92. 5. Remove the three screws that hold the power supply in place. 6. Lift the power supply out. 96 Hardware Maintenance Manual
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 103
    and replacing a PCI adapter" on page 93. 9. Reconnect all power supply cables to the system board and the drives. See "Identifying parts system board and disconnect all cables. 5. Take note of the location of the memory modules and remove them from the failing system board. See "Identifying parts on
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 104
    the handle at the rear of the system board to pull the system board and tray out the rear of the chassis. 98 Hardware Maintenance Manual
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 105
    the new system board and tray into the rear of the chassis until it is fully seated. 15. Reinstall the PCI riser. 16. Reinstall the memory modules. 17. Reinstall the heat sink on the microprocessor. 18. Reconnect all cables to the system board. See "Identifying parts on the system board" on
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 106
    the microprocessor socket handle is fully in the vertical position. Otherwise the microprocessor pins might be damaged when reinstalling the new microprocessor. 100 Hardware Maintenance Manual
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 107
    7. Position the microprocessor so that the pins are aligned with the socket and with the beveled corner 1 on the microprocessor is aligned in the socket as shown. 8. Lower the handle until it is fully in the down position and locked into the socket. This secures the microprocessor in the socket. 9.
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 108
    . 3. Slide the new drive into the bay until it is latched into position. 4. Go to "Completing the FRU replacement." on page 104. 102 Hardware Maintenance Manual
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 109
    . See "Opening the cover" on page 90. 2. Pivot the drive bay assembly upward to gain access to the hard disk drive. 3. Disconnect the signal and power cables from the rear of the hard disk drive. 4. Lift the hard disk drive and bracket up to remove it from the drive bay. 5. Note
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 110
    to confirm the updated information in the Setup Utility program. Note: When the power cord is 6. Reconnect the external cables and power cords to the computer. See " update (flash) the BIOS. See "Flash update procedures" on page 150. 8. Some FRU replacements rquire the configuration to be updated
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 111
    part is not a CRU. A single asterisk (*) means that the part is a Tier 1 CRU; two asterisks (**) mean that the part is a Tier 2 CRU. Machine Type 8086 1 2 3 4 5 6 13 7 9 8 10 12 11 Item # 8086 FRUs 1 Top Cover (all models) 2 PCI riser card and bracket assembly (all models) FRU# 89P6782
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 112
    Item # 8086 FRUs 3 200 W power supply-Hipro PFC (models 42U 42F 42G 43U ATA-100 (models A3S A3P A3L A3Y 21S 22S 22P 22L 22Y 32S 32P 32L 32Y 21U 21G 34U A3U A5U A8S A8Y 15U 16U 17U 18U 19U 21F 22U 24U 25U 32U 35U 40Y8761 71P7297 40Y8762 40Y9035 39M0612 CRU ** * * 106 Hardware Maintenance Manual
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 113
    1FK 1HJ 1LJ 3LJ) 6 CD-ROM (24x) Plus Ultrabay Enhanced Drive (models 14J 21S 21U 21G 11J A4J A5U A8S A8Y 15U 16U 18U 19U 21F 24U 27E 27J 29J 35U 36U 1FK 1HJ 1LJ 3LJ) 6 CD-ROM (24x) Plus Ultrabay Enhanced Drive (models 14J 21S 21U 21G 11J A4J A5U A8S A8Y 15U 16U 18U 19U 21F 24U 27E 27J 29J 35U 36U
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 114
    models) 9 Heat Sink (models A3S A3P A3L A3Y 11J 14J 21S 22S 22P 22L 22Y 32S 32P 32L 32Y 21U 21G 34U A4J A5U A3U A8S A8Y 13S 13L 13Y 18U 19U 21F 22U 24U 25U 26G 27E 27J 28J 29J 19R1515 19R1520 19R1522 19R1524 19R1526 19R1528 19R1530 19R1532 19R2435 CRU * ** ** 108 Hardware Maintenance Manual
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 115
    35H CTO 2DJ 2EJ 41A 41Q 41T 41B 41H) 12 Memory - 512MB NP SDRAM PC3200 (models 21S 32S 32P 32L 32Y 21U 21G 34U 19U 21F 24U 25U 27E 27J 28J 29J 2AJ 49S 49P 49L 49D 49Y 4AG 4BJ 4CC 4DJ 4EJ 3LJ 3MJ 3NJ 4FJ 4GJ 4HC) 12 Memory - 1 GB NP SDRAM PC3200 (models CTO) 13 50 mm exhaust fan (all models) FRU
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 116
    models) HSS Tray assembly (includes grommet/pins/brkt/gnd springs) (all models) Power/LED cable assembly with bracket (all models) Chassis, (includes: cover, fans, chassis A3L A3Y 11J 14J 21S 22S 22P 22L 22Y 32S 32P 32L 32Y 21U 21G 34U A3U A4J A5U A8S A8Y 13S 13L 13Y 15U 16U 17U Maintenance Manual
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 117
    8086 FRUs RJ11 connector adapter (Switzerland) (All ″G″ models) FRU# 60H6055 CRU * 8086 Keyboards (Standard PS/2 Black) US English (models A3L 22L 32L 21U 21G 34U A3U A5U 13L 15U 16U 17U 18U 19U 22U 24U 25U 26G 27E 32U 35U 36U 37G A5G A6G A6C A8G 18L 2BA
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 118
    3AP 42P 46P 49P CTO-L) 8086 Keyboards (Productivity USB, no hub) US English (models 41A 41Q 41H 4HC CTO) Chinese/US (models 41B CTO-A) Thailand (models 41T CTO-A) 8086 Windows XP Home Recovery CDs US/UK/AP/TH (models A6G 39J6269 30R4798 30R4777 30R4784 30R4770 CRU 112 Hardware Maintenance Manual
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 119
    8086 Windows XP Pro Recovery CDs US/UK/AP/TH (models A3L 22L 32L 21U 21G 34U A3U A5U 13L 15U 16U 17U 18U 19U 22U 24U 25U 26G 27E 32U 35U 36U 37G A5G A8G 18L 2BA 2BQ 2BT
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 120
    Power Cords Power Cord (models A3S A3P A3L 21S 22S 22P 22L 32S 32P 32L 21U Power Cord (ANZ) (models 36M) Power Power Power Cord (China, Power Cord (EMEA) (models 21G 26G 37G A5G A6G A8G 36G CTO-G ALG 42G 4AG ARG) Power Power Cord (EMEA) (models 21G 26G 37G A5G A6G A8G 36G CTO-G ALG 42G 4AG ARG) Power
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 121
    Machine Type 8087 13 1 2 3 4 5 6 7 9 8 10 12 11 Item # 8087 FRUs 1 Top Cover (all models) 2 PCI riser card and bracket assembly (all models) 3 200 W power supply-Hipro PFC (models 36U 36F 36S 36P 36L 36D 36Y 36G 36M 36A 36T 36C 36B 36H 36V 36K 36R 36J 36Q 35M CTO A1M
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 122
    40Y8785 26K5421 40Y8789 39M0613 03R0294 89P6791 19R1501 19R1505 19R1507 19R1509 19R2406 19R2409 19R2411 29R7261 29R7263 19R2421 19R2423 19R1511 19R1513 19R1515 19R1520 CRU * * * 116 Hardware Maintenance Manual
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 123
    36T 36C 36B 36H 36V 36K 36R 36J 36Q 36E 35M CTO 21M 22M) 12 Memory - 1 GB NP SDRAM PC3200 (models CTO) 13 50 mm exhaust fan (all all models) HSS Tray assembly (includes grommet/pins/brkt/gnd springs) (all models) Power/LED cable assembly with bracket (all models) Chassis, (includes: cover, fans,
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 124
    Infinity Active T1 (Black) (models CTO) Speaker Power brick - US, CE, CF, LA, Taiwan (models CTO-U) Speaker Power brick - Europe (non-UK) (models CTO-G) Speaker Power brick - UK, Hong Kong (3 prong) (models 89P8309 89P8310 89P8311 89P8312 89P8313 89P8314 CRU * 118 Hardware Maintenance Manual
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 125
    179 (models 36G CTO-G) UK English (models 36G CTO-G) US Euro (models 36G CTO-G) Yugoslav/Latin (models 36G CTO-G) Brazil/Portuguese (models 36P CTO-L) 8087 Windows XP Home Recovery CDs US/UK/AP/TH (models CTO) FR/CF (models CTO) GR (models CTO-G) IT (models CTO-G) SP/LA (models CTO-G) DK (models
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 126
    models CTO-G) TR (models CTO-G) GK (models CTO-G) 8087 Windows XP Home Recovery CDs 8087 Windows XP Pro Recovery CDs US/UK/AP/TH (models 36U 36L 36G (models 36G) 8087 Power Cords Power Cord (models 36U 36F 36S 36P 36L 36D 36G 36A 36T 36V CTO-U) 120 Hardware Maintenance Manual FRU# 39J6268 39J6265
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 127
    36P 36L 36D 36Y 36G CTO-G) Power Cord (APU) (models 36Y) Power Cord (Japan) (models 36J 36E) Power Cord (China, HK) (models 36C 36B 36H) Power Cord (EMEA) (models 36G CTO-G) Power Cord (EMEA, ANZ, ASEAN Eng) (models 36G CTO-G) Power Cord (EMEA) (models 36G CTO-G) Power Cord (India) (models 36Q) FRU
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 128
    Machine Type 8088 13 1 2 3 4 5 6 7 9 8 10 12 11 Item # 8088 FRUs 1 Top Cover (all models) 2 PCI riser card and bracket assembly (all models) 3 200 W power supply-Hipro PFC (models 99U 99F 99S 99P 40Y8758 24P3687 40Y8759 71P7293 40Y8761 122 Hardware Maintenance Manual CRU * * ** * *
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 129
    Item # 8088 FRUs 4 Hard disk drive 160GB 7200rpm Serial ATA (models CTO) 4 Hard disk drive 160GB 7200rpm Serial ATA (models CTO) 4 Hard disk drive 160GB 7200rpm Serial ATA (models CTO) 5 Front Rotating Cage assembly (all models) 6 CD-ROM (24x) Plus Ultrabay Enhanced Drive (models 99U 99F 99S
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 130
    99G 99M 99A 99Q 99T 99C 99B 99H 99V 99K 99J CTO) 12 Memory - 1GB NP SDRAM PC3200 (models CTO) 13 50 mm exhaust fan HSS Tray assembly (includes grommet/pins/brkt/gnd springs) (all models) Power/LED cable assembly with bracket (all models) Chassis, (includes: cover, Hardware Maintenance Manual
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 131
    IEEE 1394 Adapter -Firewire (models CTO) Speakers, Infinity Active T1 (Black) (models CTO) Speaker Power brick - US, CE, CF, LA, Taiwan (models CTO-U) Speaker Power brick - Europe (non-UK) (models CTO-G) Speaker Power brick - UK, Hong Kong (3 prong) (models CTO-G CTO-A) RJ11 connector adapter (Spain
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 132
    99G CTO-G) Yugoslav/Latin (models 99G CTO-G) Brazil/Portuguese (models 36P CTO-L) 8088 Windows XP Home Recovery CDs US/UK/AP/TH (models CTO) FR/CF (models CTO) GR models CTO-G) HU (models CTO-G) 126 Hardware Maintenance Manual FRU# 89P8318 89P8319 89P8320 89P8321 89P8322 89P8323 89P8324 89P8325
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 133
    (models CTO-G) GK (models CTO-G) 8088 Windows XP Home Recovery CDs 8088 Windows XP Pro Recovery CDs US/UK/AP/TH (models 99T 99V-U) Power Cord (ANZ) (models 99M) Power Cord (EMEA, ANZ, ASEAN Eng, Korea) (models 99G 99K) Power Cord (EMEA, ANZ, ASEAN Eng, HK Eng) (models 99G 99H) Power Cord (EMEA)
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 134
    99J) Power Cord (China, HK) (models 99C 99B 99H) Power Cord (EMEA) (models 99G) Power Cord (EMEA, ANZ, ASEAN Eng) (models 99G) Power Cord (EMEA) (models 99G) Power Cord (India) (models 99Q) FRU# 14F0068 36L8879 1838576 02K0545 14F0086 14F0014 14F0050 49P2055 CRU 128 Hardware Maintenance Manual
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 135
    Machine Type 8089 13 1 2 3 4 5 6 7 9 8 10 12 11 Item # 8089 FRUs 1 Top Cover (all models) 2 PCI riser card and bracket assembly (all models) 3 200 W power supply-Hipro PFC (models 11U 12U 21U 22U 71G 72G 73G 74G 75G C1U C2U C3U C4U CTO 31U 32U 76G 77G C5U 23S 23D 13G) 4 Hard disk drive
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 136
    Bezel assembly (all models) 8 Speaker Cable assembly (all models) 9 Heat Sink (models 11U 74G C1U 12U C2U 21U 22U 71G 75G C3U 72G 73G C4U CTO 23S 23D 31U 32U 76G 77G C5U 13G) 10 Microprocessor - 2.4GHZ Northwood 19R1511 CRU * * * * * * * * * * * * * * * ** 130 Hardware Maintenance Manual
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 137
    Memory - 256MB NP SDRAM PC2700 (models 11U 74G CTO) 12 Memory - 512MB NP SDRAM PC2700 (models CTO) 12 Memory - 1 GB NP SDRAM PC2700 (models CTO) 12 Memory - 128MB NP SDRAM PC3200 (models CTO) 12 Memory - 256MB NP SDRAM PC3200 (models 12U 21U springs) (all models) Power/LED cable assembly with
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 138
    CTO) Mouse, Scrollpoint Optical (models CTO) Mouse, optical wheelmouse (models 11U 12U 21U 22U 71G 72G 73G 74G 75G CTO 23S 23D 31U 32U 76G 77G 13G) PCI ) Speaker Power brick - US, CE, CF, LA, Taiwan (models CTO) Speaker Power brick - Europe (non-UK) (models CTO-G) Speaker Power brick - Manual CRU
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 139
    ) US Euro (models 71G 72G 73G 74G 75G CTO-G 76G 77G 13G) Yugoslav/Latin (models 71G 72G 73G 74G 75G CTO-G 76G 77G 13G) 8089 Windows XP Home Recovery CDs US/UK/AP/TH (models CTO-U CTO-G) FR/CF (models CTO-U CTO-G) GR (models CTO-G) IT (models CTO-G) SP/LA (models CTO
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 140
    TR (models CTO-G) GK (models CTO-G) 8089 Windows XP Home Recovery CDs FRU# 39J6266 39J6269 CRU * * 8089 Windows XP Pro Recovery CDs US/UK/AP/TH (models 11U 12U 21U 22U 71G 72G 73G 74G 75G CTO-U CTO-G 31U 32U 76G 77G 13G) FR/CF (models 71G 72G 73G 74G 75G CTO-U CTO-G 76G 77G
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 141
    Machine Type 8090 13 1 2 3 4 5 6 7 9 8 10 12 11 Item # 8090 FRUs 1 Top Cover (all models) 2 PCI riser card and bracket assembly (all models) 3 200 W power supply-Hipro PFC (models 11U A1U A2U 12U 21U 22U 71G 72G C1U C2U C3U C4U C5U C6U C7U A3U 23C 24B CTO A5U A7U 14U 26U 31U 32U 73G 73U
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 142
    Item # 8090 FRUs 4 Hard disk drive 80GB 7200rpm Serial ATA all models) 9 Heat Sink (models 11U A1U C1U A2U 71G C2U 72G C3U 12U C4U C5U 21U 22U C6U C7U A3U 23C 24B CTO A4S A5U A6S A6Y A7U 13S 13Y 14U 25S 25Y CRU * * * * * * * * * * * * * * * ** ** ** ** ** 136 Hardware Maintenance Manual
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 143
    Memory - 512MB NP SDRAM PC2700 (models CTO) 12 Memory - 1 GB NP SDRAM PC2700 (models CTO) 12 Memory -128MB NP SDRAM PC3200 (models CTO) 12 Memory - 256MB NP SDRAM PC3200 (models 12U 21U table are not illustrated. 8090 FRUs Bezel, Ultra-Bay- springs) (all models) Power/LED cable assembly with
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 144
    26U) Speaker Power brick - US, CE, CF, LA, Taiwan (models CTO-U A5U 26U) Speaker Power brick - Europe (non-UK) (models CTO-G) Speaker Power brick - 60H6054 60H6055 CRU 8090 Keyboards (Standard PS/2 Black) US English (models 11U A1U A2U 12U 21U 22U 71G 72G * * * 138 Hardware Maintenance Manual
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 145
    8090 Keyboards (Standard PS/2 Black) Danish (models 71G 72G CTO-G 73G A8G) Dutch (models CTO-G 73G A8G) US Euro (models 71G 72G CTO-G 73G A8G) Yugoslav/Latin (models 71G 72G CTO-G 73G A8G) 8090 Windows XP Home Recovery CDs US/UK/AP/TH (models A3U CTO-U CTO-G A5U 14U 26U) FR/CF (models CTO-U CTO-G)
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 146
    CTO-G) GK (models CTO-G) CS (models 23C) HK (models 24B) 8090 Windows XP Home Recovery CDs FRU# 39J6262 39J6268 39J6265 39J6267 39J6263 39J6266 39J6269 30R4777 27K6746 CRU 8090 Windows XP Pro Recovery CDs US/UK/AP/TH (models 11U A1U A2U 12U 21U 22U 71G 72G CTO-U CTO-G A7U 31U 32U 73G A8G) FR
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 147
    8090 Power Cords Power Cord (EMEA) (models 71G 72G CTO-G 73G A8G) Power Cord (EMEA, LA) (models 71G 72G CTO-G A4S A4Y A6S A6Y 13S 13Y 25S 25Y 73G A8G) Power Cord (APU) (models A4Y A6Y 13Y 25Y) Power Cord (EMEA) (models 71G 72G CTO-G 73G A8G) Power Cord (EMEA, ANZ, ASEAN Eng) (models 71G 72G CTO-G
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 148
    Machine Type 8094 13 1 2 3 4 5 6 7 9 8 10 12 11 Item # 8094 FRUs 1 Top Cover (all models) 2 PCI riser card and bracket assembly (all models) 3 200 W power supply-Hipro PFC (models CTO 11A 11T 11U 11Q 40Y8759 71P7293 40Y8761 71P7297 142 Hardware Maintenance Manual CRU * * ** * *
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 149
    Item # 8094 FRUs 4 Hard disk drive 160GB 7200rpm Serial ATA (models CTO) 4 Hard disk drive 160GB 7200rpm Serial ATA (models CTO) 5 Front Rotating Cage assembly (all models) 6 CD-ROM (24x) Plus Ultrabay Enhanced Drive (models CTO 11A 11Q 11T 11U 11B 11H 11V) 6 CD-ROM (24x) Plus Ultrabay
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 150
    (ver 1.3C) (models CTO) 12 Memory - 128MB NP SDRAM PC2700 (models CTO) 12 Memory - 256MB NP SDRAM PC2700 (models CTO 11A 11Q 11T 11U HSS Tray assembly (includes grommet/pins/brkt/gnd springs) (all models) Power/LED cable assembly with bracket (all models) Chassis, (includes: cover, fans Manual
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 151
    IEEE 1394 Adapter -Firewire (models CTO) Speakers, Infinity Active T1 (Black) (models CTO) Speaker Power brick - US, CE, CF, LA, Taiwan (models CTO-U) Speaker Power brick - Europe (non-UK) (models CTO-G) Speaker Power brick - UK, Hong Kong (3 prong) (models CTO-G CTO-A) RJ11 connector adapter (Spain
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 152
    (models CTO-G) Yugoslav/Latin (models 21G 26G 37G A5G A6G A8G 36G CTO-G) 8094 Windows XP Pro Recovery CDs US/UK/AP/TH (models CTO 11A 11Q 11T 11U 11H) FR/ 11V) Hong Kong-TC (models 11B) 146 Hardware Maintenance Manual FRU# 89P8323 89P8324 89P8325 89P8326 89P8327 89P8328 89P8329 89P8330 89P8331
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 153
    Cord (EMEA, ANZ, ASEAN Eng, Korea) (models CTO-G) Power Cord (EMEA, ANZ, ASEAN Eng, HK Eng) (models CTO-G 11H) Power Cord (EMEA) (models CTO-G) Power Cord (EMEA, LA) (models CTO-G) Power Cord (China, HK) (models 11B 11H) Power Cord (EMEA) (models CTO-G) Power Cord (EMEA, ANZ, ASEAN Eng) (models CTO
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 154
    148 Hardware Maintenance Manual
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 155
    and the servicer. The servicer can use the DMI MIF Browser to update the MIF information in the EPROM. It is anticipated that some servicers might charge for this service. To update the EPROM using the DMI MIF Browser, use the following procedure. © Lenovo 2005, 2008. Portions © IBM Corp. 2005
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 156
    From your browser, type http://www.lenovo.com/think/support. 2. In the Use Quick path field, type your 4-digit machine type and click Go. 3. Under Browse by product, click Downloads and drivers. 4. Scroll down to the BIOS catagory and click on the Flash Bios Update. 150 Hardware Maintenance Manual
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 157
    printed instructions to download, extract, and install the update. Recovering from a POST/BIOS update failure Attention: If an interruption occurs during a POST/BIOS update (flash update), the computer might not restart correctly. If this occurs, perform the following procedure (also known as a Boot
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 158
    components of the computer such as the system power supply, processor, hard disk drives, and some monitors. Automatic configuration and power interface (ACPI) BIOS Being an ACPI BIOS system, the operating system is allowed to control the power management features of the computer and the setting
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 159
    Windows operating system and is hidden from the Windows not be possible in the Windows environment. The following recovery problem with the software is encountered, you can use the recovery tools from either the Windows workspace is not displayed until you type the password. 3. The Rescue and
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 160
    154 Hardware Maintenance Manual
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 161
    operation of any other product, program, or service. Lenovo may have patents or pending patent applications covering 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
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 162
    States, other countries, or both: Lenovo ThinkCentre PS/2 Rescue and Recovery The following terms are trademarks of International Business Machines Corporation in the United States, other countries, or both: Asset ID Alert on LAN IBM (used under license) Wake on LAN Intel and Pentium are trademarks
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 163
  • Lenovo ThinkCentre A50 | Hardware Maintenance Manual - Page 164
    Part Number: 19R2387 Printed in USA (1P) P/N: 19R2387
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Hardware
Maintenance
Manual
Types
8086,
8087,
8088,
8089
Types
8090,
8094