Lenovo 3000 Hardware Maintenance Manual page 137

11. Rotate handle 1 to release the heat sink clamp and then disengage the clamp
from the plastic retention bracket.
12. Lift the heat sink and fan assembly off the failing system board. Place the heat
sink on its side so that the thermal grease does not come in contact with
anything.
13. Remove the retention module from the rear of the failing system board and
install it in the same position on the new system board.
14. To release the microprocessor 2 from the system board socket, lift the small
handle 1 .
Chapter 9. Replacing FRUs - Tower Computers
131