Types 8013, 8716, 8976, 8986, 9266, 9282, 9374, 9384, And 9647 - Lenovo ThinkCentre A55 Hardware Maintenance Manual

23. Install the new system board into the chassis and align the screw holes with
those in the chassis. Insert and tighten the screws that secure the system
board.
24. Reconnect all cables that were disconnected from the system board.
25. Reinstall the hard disk drive. See "Replacing the hard disk drive" on page 112.
26. Align the drive bay assembly with the two slots and rails on the sides of the
chassis, reconnect the drive cables on the system board, and then slide the
drive bay assembly towards the rear of the chassis until it snaps into position.
27. Reinstall the front bezel.
28. Reinstall any PCI adapter cards that were removed.
29. Position the fan duct on the heat sink fan.
30. Go to "Completing the FRU replacement" on page 124.

Types 8013, 8716, 8976, 8986, 9266, 9282, 9374, 9384, and 9647

Important
The heat sink and microprocessor might be very hot. Make sure these
components are cool enough to safely handle before continuing this
procedure.
1. Remove the cover. See "Removing the cover" on page 87.
2. Lift the fan duct off the heat sink fan.
3. Remove any adapter cards installed in the PCI connectors.
4. Remove the front bezel by releasing the three tabs and pivoting the bezel
forward to remove completely.
5. Slide the drive bay assembly forward until the drive bay assembly is aligned
with the two slots on the sides of the chassis and remove the drive cables
from the system board. Then pull upward on the handle 1 on the drive bay
assembly to remove it completely from the computer.
Chapter 8. Replacing FRUs (desktop computers)
101