Lenovo H405 Hardware Maintenance Manual page 54

Hardware Maintenance Manual
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6. Holding the microprocessor with your fingers, remove the protective
cover that protects the gold contacts on the new microprocessor
7. 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.
8. Lower the microprocessor straight down into the system board socket.
.