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System board removal movie - ThinkCentre A51p (type 8420, 8421) / ThinkCentre M51 (type 8095, 8141, 8142, 8145)

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System board installation movie


Text of the audio portion of the system board removal movie

To remove the system board:

  1. Remove the top cover.
  2. Turn off the system and all attached peripheral devices, disconnect all power cord, and all external signal cables.
  3. Press the cover release buttons, one on each side and rotate the cover up from the rear and remove it.
  4. Rotate the drive bay assembly upward.
  5. Disconnect the following cables from the system board:
    1. P2 power
    2. Diskette signal
    3. Speaker
    4. Front panel
    5. CD-ROM signal
    6. SATA signal
    7. Cover presence switch
    8. P1 power and fan power
  6. Remove the DIMMs. Push out on the two latches
  7. Lift the DIMM out of the socket and place it on a static protected surface
  8. Remove the heat sink. Prior to removing the heat sink, the system should be powered on for a few minutes to soften the thermal layer so the heat sink can be easily removed.
  9. Rotate the heat sink release lever to the open position.
  10. Pivot the heat sink up to disengage the bottom end of the heat sink from the lip on the heat sink retention bracket
  11. Remove the processor. Rotate the processor release lever to the open position
  12. Open the processor retainer
  13. Place the vacuum tool into the center of the processor and squeeze the tool to apply suction to the processor and then gently lift the processor straight up from the socket. Always place the protective over the processor contacts when the processor is out of the system. Use care not to touch the contacts as any contamination may damage them.
  14. Close the processor retainer.
  15. Rotate the processor release lever to the locked position. If the processor is going to be remove for any period of time, a dust cover must be installed to protect the socket from contamination.
  16. Remove the battery
  17. Press on the rear edge of the battery until it slides out from under the spring retaining clip and lift it out.
  18. Remove the seven screws used securing the board to the chassis.
  19. Slide the system board to the front of the system to release it from the tab of the chassis and lift the system board out.
    Here is a closer look at bracket on the system board and the alignment tabs in the chassis.

Additional information

View detailed system board removal and installation instructions for 8095, 8420, 8421, 8141, 8142, 8145 systems.

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Document ID : PD011737
Legacy Document ID : MIGR-55743
Last Updated :
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