Lenovo ThinkCentre E51 Hardware Maintenance Manual - Page 108

12. Using the vacuum pen 1 , remove the microprocessor 2 from the system board socket by lifting it straight up and out of the socket. Important Do not touch the gold contacts on the bottom of the microprocessor. If you must touch the microprocessor, touch only the sides. Attention: Do not drop anything onto the microprocessor socket while it is exposed. The socket pins must be kept as clean as possible. 13. To install the microprocessor on the new system board, position the microprocessor so that the small triangle 1 on one corner is aligned with the corresponding triangle on the socket. 14. Make sure that the small handle is in the raised position. 15. Using the vacuum pen 1 to pick up the microprocessor, lower the microprocessor straight down into the socket. 102 Hardware Maintenance Manual