Lenovo ThinkCentre M58e Hardware Maintenance Manual - Page 111
of the microprocessor socket cover with the alignment keys - 7408
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9. The failing system board must be returned with a microprocessor socket cover to protect the pins during shipping and handling. Install the microprocessor socket cover removed from the new system board on the failing system board. To install the microprocessor socket cover: a. Release the lever securing the microprocessor retainer and open the retainer to access the microprocessor. b. Grasp the microprocessor on the sides and lift it straight up and out of the socket. Do not touch the contacts on the microprocessor socket. c. Align the notches 1 of the microprocessor socket cover with the alignment keys 2 of the microprocessor socket. Lower the socket cover straight down into the microprocessor socket on the system board. Note: Your microprocessor socket and cover might look slightly different from the illustration. d. Carefully press the socket cover straight downwards until it is secured into the socket. Chapter 9. Replacing FRUs (Types 7259, 7267, 7269, 7279, 7290, 7297, 7303, 7306, 7408, 7487, 7506 and 7514) 105