Lenovo THINKCENTRE 6019 - Manual (Page 135)

17. Lower the microprocessor retainer 1 and then lower the lever 3 to secure
the retainer. Make sure the lever is securely locked into position.
Note: There will be a black plastic cover on the microprocessor retainer to
protect the socket on the new system board. When you lock the
microprocessor in position, remove the black plastic cover. Place the
black plastic cover on the microprocessor retainer of the failing system
board.
18. Install the new retention module (if required) on the new system board.
19. Install the new system board into the rear of the chassis until it is fully seated.
20. Place the heat sink 1 into position and lower the lever 2 to secure the heat
sink.
21. Reinstall the memory modules on the new system board in the same location
as they were on the failing system board. See “Replacing a memory module”
on page 119.
22. Reconnect all cables that were disconnected from the system board. See
“System board connectors” on page 117.
23. Reinstall the PCI riser.
24. Reinstall the rear fan bracket assembly and connect the fan cable to the system
board.
25. Go to “Completing the parts replacement” on page 148.
Chapter 9. Replacing FRUs - Ultra SFF Desktop computers 129