Lenovo ThinkCentre A70 7099 Hardware Maintenance Manual page 110

Figure 21. Removing the microprocessor
10. Remove the new microprocessor 1 from the protective cover 2 that
11. Hold the new microprocessor by the edges and align the notches on it with
12. Lower the new microprocessor straight down into the microprocessor socket
13. Close the microprocessor retainer and lock it into position with the small
14. Reinstall the heat sink and fan assembly. See "Replacing the heat sink and fan
15. Reinstall any parts and reconnect any cables that have been removed or
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Hardware Maintenance Manual
d. Do not drop anything onto the microprocessor socket while it is exposed.
The socket pins must be kept as clean as possible.
9. Make sure that the small handle is in the raised position.
protects the gold contacts on the bottom of the new microprocessor.
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.
on the system board.
handle to secure the new microprocessor in the socket.
assembly" on page 100.
disconnected.