Lenovo ThinkCentre Edge 91z Hardware Maintenance Manual page 116

Figure 30. Noting the orientation of the microprocessor in the socket
c. Touch only the sides of the microprocessor. Do not touch the gold contacts on the bottom.
d. Do not drop anything onto the microprocessor socket while it is exposed. The socket pins must be
kept as clean as possible.
Figure 31. Removing the microprocessor
9. Make sure that the small handle is in the raised position and the microprocessor retainer is fully open.
10. Hold the new microprocessor and align the notches
microprocessor socket, or align the small triangle
corresponding beveled corner of the microprocessor socket.
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2 on it with the alignment keys in the
1 on one corner of the new microprocessor with the