IBM THINKCENTRE 8123 - Manual (Page 20)

Replacing the system board assembly
Attention:
Do not remove the computer cover or attempt any repair before reading the “Important
safety information” in the Quick Reference that was included with your computer or in the
Hardware Maintenance Manual (HMM) for the computer. To obtain copies of the Quick
Reference or HMM, go to http://www.ibm.com/pc/support.
1. Turn off the computer and allow it to cool for one hour.
2. Remove the computer cover. See “Removing the computer cover” on page 5.
Note: For this procedure, it helps to lay the computer on its side.
3. Carefully note the location of all cable connections on the system board. It will
be necessary to reconnect them correctly after you install the new system
board assembly. See “Identifying parts on the system board” on page 4 to
locate the cables.
Important
Note the cable routing. It is important to route the cables the same way
after you install the new system board.
4. Remove the air baffle by squeezing the two tabs 1 together and pulling it
out of the chassis.
5. Remove any PCI adapter cards. See “Replacing an adapter” on page 26.
12 Hardware Replacement Guide