IBM THINKCENTRE 8141 - Manual (Page 18)

7. When installing a new microprocessor 2 , loosen the black cover 3 that
protects the gold contacts on the microprocessor, but do not remove it. Use the
vacuum pen 1 to pick up the new microprocessor then completely remove
the black cover.
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8. Position the microprocessor so that the notches 1 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.
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9. Use the vacuum pen to lower the microprocessor straight down into the
system board socket.
10 Hardware Removal and Replacement Guide