Lenovo 3000 H305 Desktop - Manual (Page 45)

Chapter 8. Replacing hardware
43
Important
Do not touch the gold contacts on the bottom of the
microprocessor. When handling the microprocessor, touch only the
sides.
7. Lift the microprocessor straight up and out of the socket.
Note
a. Note the orientation of the notches 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.
8. Make sure that the microprocessor retainer is fully open.