Lenovo ThinkCentre A61 Hardware Maintenance Manual - Page 137

Important Do not touch the gold contacts on the bottom of the microprocessor. If you must touch the microprocessor, touch only the sides. 7. 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. 8. Make sure that the microprocessor retainer is fully open. 9. Holding the microprocessor with your fingers, position the microprocessor so that the small triangle on one corner is aligned with the corresponding triangle on the microprocessor socket. 10. Lower the microprocessor straight down into the system board socket of the new system board. 11. To secure the microprocessor in the socket, close the microprocessor retainer and lock it into position with the small handle. 12. Install the heat sink and fan assembly on the system board. 13. Connect the heat sink and fan assembly cable to the system board. See "Locating parts on the system board" on page 119. 14. Position the fan duct on the heat sink fan. Chapter 9. Replacing FRUs - Desktop computers 131