Attention: Do not open your computer or attempt any repair before reading the "Important safety information". You can also find this information in the Quick Reference Guide that was included with your computer or in the Hardware Maintenance Manual (HMM) for the computer.
For ThinkCentre A52 (type 8155, 8156, 8157, 8158, 8159, 8160) and M52 (type 8099, 8116, 8215, 9210, 9211) systems:
Turn off your computer for at least one hour before removing the microprocessor to allow the thermal interface between the microprocessor and the heat sink time to cool down.
When you receive a new microprocessor, you will also receive a new heat sink and vacuum pen. You must use the new heat sink with the new microprocessor. If you use the old heat sink with the new microprocessor, your computer might overheat causing intermittent problems.
Do not touch the gold contacts on the bottom of the microprocessor. Use the vacuum pen provided to remove and install the microprocessor. If you must touch the microprocessor, touch only the sides.
Pivot the drive bay assembly upward to gain access to the microprocessor.
Release the lever 1 holding the microprocessor heat sink.
Remove the heat sink from the system board. Important: Do not use the old heat sink with the a new microprocessor. If you use the old heat sink with the new microprocessor, your computer might overheat causing intermittent problems.
Release the lever 1 for the microprocessor retainer 2 securing the microprocessor 3 and pivot the retainer upward until it is fully open.
Use the vacuum pen 1 to lift the microprocessor straight up and out of the socket.
Important: Do not touch the gold contacts on the bottom of the microprocessor. If you must touch the microprocessor, touch only the sides.
a. Notice the orientation of the notches 1 on the microprocessor. This is important when reinstalling the microprocessor on the system board.
b. Do not drop anything on the socket while it is open. Keep all contacts as clean as possible.
Make sure that the lever on the microprocessor retainer is fully open.
Loosen the black cover 3 that protect the gold contacts on the new microprocessor 2, but do not remove the black cover. Use the vacuum pen to pick up the microprocessor, and then completely remove the black cover.
Position the microprocessor so that the notches on the microprocessor are aligned with the tabs in the microprocessor socket. Important: To avoid damaging the microprocessor contacts, do not tilt the microprocessor when installing it into the socket.
Use the vacuum pen 1 to lower the microprocessor straight down into the microprocessor socket.
Lower the microprocessor retainer and lower the lever to secure the retainer.
Place the new heat sink into position and lower the lever 1 to secure the heat sink.