Lenovo ThinkCentre M55e Hardware Maintenance Manual - Page 148

Important Touch only the sides of the microprocessor. Do not touch the gold contacts on the bottom. 15. Lift the microprocessor straight up and out of the socket. Notes: a. Your microprocessor and socket might look different than the one illustrated. b. Note the orientation of the microprocessor in the socket. Look for the small triangle on one corner of the microprocessor. This is important when reinstalling the microprocessor on the new system board. c. Do not drop anything onto the microprocessor socket while it is exposed. The socket pins must be kept as clean as possible. 16. Holding the microprocessor with your fingers, position the microprocessor so that the small triangle 1 on one corner is aligned with the corresponding triangle on the socket on the new system board. 17. Make sure that the small handle is in the raised position. 18. Lower the microprocessor straight down into the system board socket of the new system board. 142 Hardware Maintenance Manual