Lenovo ThinkCentre 9120 Hardware Maintenance Manual page 130

15. Holding the microprocessor with your fingers, position the microprocessor so
16. Make sure that the small handle is in the raised position.
17. Lower the microprocessor straight down into the system board socket of the
18. Lower the small handle to secure the microprocessor in the socket.
19. Install the retention module for the heat sink and fan assembly on the system
20. Install the heat sink and fan assembly on the new system board.
21. Reconnect the heat sink and fan assembly cable to the system board. See
22. Install the new system board into the chassis and align the screw holes with
23. Reinstall the hard disk drive. See "Replacing the hard disk drive" on page
124
Hardware Maintenance Manual
b. Note the orientation of the microprocessor in the socket. Look for the small
triangle on one corner of the microprocessor. This is important when
reinstalling the microprocessor on the new system board.
c. Do not drop anything onto the microprocessor socket while it is exposed.
The socket pins must be kept as clean as possible.
that the small triangle 1 on one corner is aligned with the corresponding
triangle on the socket on the new system board.
Important
To avoid damaging the microprocessor contacts, do not tilt the
microprocessor when installing it into the socket.
new system board.
board.
"Locating parts on the system board" on page 115.
those in the chassis. Insert and tighten the screws that secure the system
board.
128.