Dell OptiPlex 755 User's Guide - Page 150
Installing the Processor
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NOTICE: When replacing the processor, do not touch any of the pins inside the socket or allow any objects to fall on the pins in the socket. 5 Gently remove the processor from the socket. Leave the release lever extended in the release position so that the socket is ready for the new processor. Installing the Processor NOTICE: Ground yourself by touching an unpainted metal surface on the back of the computer. NOTICE: When replacing the processor, do not touch any of the pins inside the socket or allow any objects to fall on the pins in the socket. 1 Follow the procedures in "Before You Begin" on page 21. 2 Remove the computer cover (see "Removing the Computer Cover" on page 90). 3 Unpack the new processor, being careful not to touch the underside of the processor. NOTICE: You must position the processor correctly in the socket to avoid permanent damage to the processor and the computer when you turn on the computer. 4 If the release lever on the socket is not fully extended, move it to that position. 5 Orient the front and rear alignment-notches on the processor with the front and rear alignmentnotches on the socket. 6 Align the pin-1 corners of the processor and socket. 150 Processor