Lenovo ThinkCentre A70 7099 Hardware Maintenance Manual page 143

d. Do not drop anything onto the microprocessor socket while it is exposed.
The socket pins must be kept as clean as possible.
Figure 55. Removing the microprocessor
7. Make sure that the small handle is in the raised position.
8. Remove the new microprocessor 1 from the protective cover 2 that
protects the gold contacts on the bottom of the new microprocessor.
9. Hold the new microprocessor by the edges and align the notches on it with
the tabs in the microprocessor socket, or align the small triangle on one corner
of the microprocessor with the corresponding beveled corner of the
microprocessor socket.
10. Lower the new microprocessor straight down into the microprocessor socket
on the system board.
11. Close the microprocessor retainer and lock it into position with the small
handle to secure the new microprocessor in the socket.
12. Reinstall the heat sink and fan assembly. See "Replacing the heat sink and fan
assembly" on page 131.
13. To complete the replacement, go to "Completing the parts replacement" on
page 157.
Chapter 9. Replacing FRUs - Desktop computers
137