Lenovo ThinkCentre A57, Hardware Maintenance Manual

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8. Make sure that the microprocessor retainer is fully open.
9. Holding the microprocessor with your fingers, remove the protective cover 2 that protects the gold
contacts on the new microprocessor 1 .
10. Holding the microprocessor with your fingers, 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.
11. Lower the microprocessor straight down into the system board socket of the system board.
12. To secure the microprocessor in the socket, close the microprocessor retainer and lock it into position
with the small handle.
13. Use the thermal grease syringe to place five drops of grease on the top of the microprocessor. Each drop
of grease should be 0.03ml (3 tick marks on the grease syringe).
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ThinkCentre Hardware Maintenance Manual