Dell Precision 490 Desktop User's Guide - Page 47

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. 2. Remove the computer cover (see Removing the Computer Cover). 3. Rotate the hard-drive carrier out of the computer (see Rotating the Hard-Drive Carrier Out of the Computer). 4. Rotate the processor access door to its open position. 5. If you are replacing a processor, remove the processor (see Removing the Processor). 6. 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. 7. Open the processor cover by sliding the release lever from under the center cover latch on the socket. Ensure that the release lever is fully extended. 1 processor cover 2 processor 3 socket 4 release lever 8. Orient the front and rear alignment notches on the processor with the front and rear alignment notches on the socket. 9. Align the pin-1 corners of the processor and socket.