Lenovo J100 Hardware Maintenance Manual page 140

10. Position the microprocessor so that the notches on the microprocessor are
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Lenovo 3000 J Series
Important
Do not touch the gold contacts on the bottom of the microprocessor. If
you must touch the microprocessor, touch only the sides.
Attention:
Do not drop anything onto the microprocessor socket while it is exposed. The
socket pins must be kept as clean as possible.
8. Make sure that the microprocessor retainer is fully open.
9. Loosen the protective cover 3 that protects the gold contacts on the new
microprocessor 2 but do not remove it. Use the vacuum pen 1 to pick up
the microprocessor then completely remove the cover.
aligned with the tabs in the microprocessor socket.