HP Dc7900 Service Reference Guide: HP Compaq dc7900 Business PC - Page 118

Processor 1. Prepare the computer for disassembly (Preparation for Disassembly on page 63). 2. Remove the computer access panel (Computer Access Panel on page 70). 3. Remove the heatsink (Heatsink on page 104). 4. Rotate the locking lever to its full open position (1). 5. Raise and rotate the microprocessor retainer to its fully open position (2). 6. Carefully lift the processor from the socket (3)). CAUTION: Do NOT handle the pins in the processor socket. These pins are very fragile and handling them could cause irreparable damage. Once pins are damaged it may be necessary to replace the system board. The heatsink must be installed within 24 hours of installing the processor to prevent damage to the processor's solder connections. Figure 7-50 Removing the processor To install a new processor: 1. Place the processor in its socket and close the retainer. 2. Secure the locking lever. If reusing the existing heatsink, go to step 3. If using a new heatsink, go to step 5. 3. If reusing the existing heatsink, apply the thermal grease provided in the spares kit to the top of the processor. 4. Clean the bottom of the heatsink with the provided alcohol pad and place it atop the processor. 106 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis