IBM 4851 514, Planning, Installation And Service Manual

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7. Replace the rear inner metal cover and rear cover.
System board – removing and replacing
Attention: Establish personal grounding before touching this unit. See
“Electrostatic Discharge (ESD)” on page 119.
Notes:
1. The system board comes with factory default CMOS settings. When replacing
the system board, you can usually save the CMOS settings by running the
SaveCMOS utility before replacing the old system board. Then, run LoadCMOS
after the installation of the new system board.
1. Remove the back cover as described at “Rear cover – removing and replacing”
on page 61.
2. Remove the power supply. See “Power supply – removing and replacing” on
page 68.
3. Remove the inner back metal cover. See “Rear metal panel cover – removing
and replacing” on page 62.
4. Remove the rear connector panel (tailgate). See “Rear connector panel
(tailgate) with fan – removing and replacing” on page 64.
5. Disconnect all cables from the system board.
6. Remove the memory modules. See “Memory modules – removing and
replacing” on page 68.
Note: Save the modules for transfer to the new system board.
Figure 51. Removing the system board
Removing and replacing FRUs
Updated October, 2008
66
SurePOS 500 Model 514