HP Dc7700 HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Ed - Page 184

Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis Ä CAUTION: Heatsink retaining screws should be tightened in diagonally opposite pairs (as in an X) to evenly seat the heatsink on the processor. This is especially important as the pins on the socket are very fragile and any damage to them may require replacing the system board. 8.17 Processor 1. Prepare the computer for disassembly (Section 8.1). 2. Remove the computer access panel (Section 8.3). 3. Remove the optical drive (Section 8.4). 4. Disconnect the three front I/O, fan, and speaker cables from the system board. 5. Remove the front panel assembly (Section 8.5). 6. Remove the heatsink (Section 8.16). 7. Rotate the processor locking lever to its full open position 1. 8. Raise and rotate the microprocessor retainer to its fully open position 2. 9. Carefully lift the processor from the socket 3. Ä 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. Ä CAUTION: The heatsink must be installed within 24 hours of installing the processor to prevent damage to the processor's solder connections. 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. 8-22 433612-001 Service Reference Guide, dc7700