Lenovo ThinkCentre A58 Hardware Maintenance Manual page 112

Figure 19. Removing the microprocessor
10. Position the new microprocessor so that the notches of the new
11. Lower the new microprocessor straight down into the socket on the system
12. Close the microprocessor retainer and lock it into position with the small
13. Reinstall the heat sink and fan assembly. See "Replacing the heat sink and fan
14. Reinstall any parts and reconnect any cables that have been removed.
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Hardware Maintenance Manual
c. Touch only the sides of the microprocessor. Do not touch the gold contacts
on the bottom.
d. Do not drop anything onto the socket while it is exposed. The socket pins
must be kept as clean as possible.
8. Make sure that the small handle is in the raised position.
9. Remove the protective cover 2 that protects the gold contacts of the new
microprocessor 1 .
microprocessor are aligned with the tabs in the microprocessor socket, or the
small triangle on one corner of the new microprocessor is aligned with the
corresponding beveled corner of the microprocessor socket.
board.
handle to secure the new microprocessor in the socket.
assembly" on page 102.