Lenovo ThinkCentre M76, Hardware Maintenance Manual, Page: 103 / 214

6. Carefully take note of the locations of all cable connections on the system board and disconnect all
the cables. See “Locating parts on the system board” on page 76.
7. Remove the heat sink and fan assembly from the failing system board. See “Replacing the heat sink and
fan assembly” on page 94.
8. Remove the eight screws that secure the system board.
Figure 32. Removing the eight screws that secure the system board
9. Carefully slide the system board so that it can be released from the mounting studs that secure the
system board in place.
10. Lift the system board out of the chassis.
11. Remove the microprocessor from the failing system board and install it on the new system board.
See “Replacing the microprocessor” on page 96.
12. Install the new system board into the chassis by aligning the eight mounting studs in the chassis with the
corresponding holes in the new system board. Carefully slide the new system board into the chassis until
it is secured in place by the mounting studs. Then, install the eight screws to secure the system board.
13. Install the heat sink and fan assembly and connect the heat sink and fan assembly cable to the new
system board. See “Replacing the heat sink and fan assembly” on page 94.
14. Install all memory modules and PCI cards removed from the failing system board on the new system
board. See “Installing or replacing a memory module” on page 83 and “Installing or replacing a PCI
card” on page 80.
15. Reconnect all remaining cables to the system board. See “Locating parts on the system board”
on page 76.
16. Install the hard disk drive. See “Replacing the primary hard disk drive” on page 100 and See “Replacing
the secondary hard disk drive” on page 102.
17. To complete the replacement, go to “Completing the parts replacement” on page 110.
Chapter 8
.
Replacing FRUs (Machine Types: 3114, 3121, 3123, and 3127.)
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