Compaq dx7400 Service Reference Guide - HP Compaq dx7400 Business PC - Page 89

Processor

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Processor 1. Prepare the computer for disassembly (Preparation for Disassembly on page 56). 2. Remove the access panel and lay the computer down on its side to make it easier to work on (Access Panel on page 57). 3. Disconnect the heatsink control cable from the system board and remove the heatsink Heatsink on page 78). 4. Rotate the locking lever to its full open position (1). 5. Raise and rotate the microprocessor retainer to its full 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. 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 6. 3. If reusing the existing heatsink, clean the bottom of the heatsink with the alcohol pad provided in the spares kit. 4. Apply the thermal grease provided in the spares kit to the top of the processor and install the heatsink atop the processor. Processor 79

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Processor
1.
Prepare the computer for disassembly (
Preparation for Disassembly
on page
56
).
2.
Remove the access panel and lay the computer down on its side to make it easier to work on
(
Access Panel
on page
57
).
3.
Disconnect the heatsink control cable from the system board and remove the heatsink
Heatsink
on page
78
).
4.
Rotate the locking lever to its full open position (1).
5.
Raise and rotate the microprocessor retainer to its full 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.
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 6.
3.
If reusing the existing heatsink, clean the bottom of the heatsink with the alcohol pad provided in
the spares kit.
4.
Apply the thermal grease provided in the spares kit to the top of the processor and install the
heatsink atop the processor.
Processor
79