Lenovo ThinkCentre 8098 Hardware Maintenance Manual page 111

4. Release the lever 2 securing the microprocessor retainer 3 then rotate the
retainer to fully open position. Do not remove the microprocessor 1 until
instructed.
Important
Do not touch the gold contacts on the bottom of the microprocessor. If
you must touch the microprocessor, touch only the sides.
Chapter 8. Replacing FRUs (Types 8095, 8141, 8142, 8145, 8420, and 8421)
105