Lenovo ThinkCentre 3231 Hardware Maintenance Manual page 106

10. Remove the heat sink and fan assembly from the failing system board. See
11. Remove the retention module from the rear of the failing system board and
12. Remove the microprocessor from the failing system board and install it on the
13. Reinstall the heat sink and fan assembly. See "Replacing the heat sink and fan
14. Install the new system board into the chassis and align the screw holes with
15. Pivot the hard disk drive back into position.
16. Reconnect the power and signal cables to the hard disk drive.
17. Reconnect all remaining cables to the system board. See "Locating parts on the
18. Go to "Completing the FRU replacement" on page 122.
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5. Press the release tab 1 down, slide the hard drive cage 2 back, and pivot
the hard disk drive outward as shown.
6. Carefully take note of the location of all cable connections on the system
board and disconnect all cables. See "Locating parts on the system board" on
page 89.
7. Remove the screws that secure the system board to the chassis.
8. Lift the system board out of the chassis.
9. Remove the memory modules from the failing system board and install them
in the same location on the new system board. See "Replacing a memory
module" on page 91.
"Replacing the heat sink and fan assembly" on page 94.
install it in the same position on the new system board.
new system board. See "Replacing the microprocessor" on page 96.
assembly" on page 94. And connect the heat sink and fan assembly cable to
the system board. See "Locating parts on the system board" on page 89.
those in the chassis. Insert and tighten the screws that secure the system
board.
system board" on page 89.