HP dc73 Service Reference Guide - HP Compaq dc7800 Business PC - Page 198

Secure the locking lever., Place the processor in its socket and close the retainer.

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Processor 1. Prepare the computer for disassembly (Preparation for Disassembly on page 159). 2. Remove the computer access panel (Computer Access Panel on page 163). 3. Remove the heatsink (Heatsink on page 184). 4. Rotate the processor 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. 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, clean bottom of the heatsink and apply the thermal grease provided in the spares kit to the top of the processor. 4. Position the heatsink atop the processor. 186 Chapter 9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis

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Processor
1.
Prepare the computer for disassembly (
Preparation for Disassembly
on page
159
).
2.
Remove the computer access panel (
Computer Access Panel
on page
163
).
3.
Remove the heatsink (
Heatsink
on page
184
).
4.
Rotate the processor 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.
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, clean bottom of the heatsink and apply the thermal grease provided
in the spares kit to the top of the processor.
4.
Position the heatsink atop the processor.
186
Chapter 9
Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis