Lenovo ThinkStation Hardware Maintenance Manual page 119

Notes:
a. Note the orientation of the notches 1 on the microprocessor. This is
important when reinstalling the microprocessor on the new system board.
b. Do not drop anything onto the microprocessor socket while it is exposed.
The socket pins must be kept as clean as possible.
6. 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.
Chapter 10. Replacing FRUs - Menorca Computers
113