Removal and replacement procedures 46
Replacing the processor
CAUTION:
To allow the heatsink to draw away as much heat as possible from the processor, there
must be a tight connection between the heatsink base and the top of the processor. To ensure this
connection, a thermal grease compound must be used.
To replace or install a processor:
1.
Using a clean cloth dipped in rubbing alcohol, clean the surface of the heatsink base (contact
area) and the top of new processor. Ensure that both surfaces are clean and that no particles or
dust contaminants are evident.
2.
Apply the thermal grease compound to the top of the processor (the contact surface).
CAUTION:
HP recommends thermal grease of X-23-7783D made by Shin-Etsu.
3.
Use the edge of a razor blade to spread the grease throughout the entire contact surface and
lightly scrape off any excess grease. Make sure that you only apply a very thin layer so that the
contact surface is still visible.
CAUTION:
Never touch the contact area of the processor. Any contaminant could prevent the
mounting pads from making contact with the socket.
CAUTION:
Applying too much grease creates a gap between the contact surfaces, significantly
reducing the ability of the cooler to draw out heat. Installing the cooler with excessive grease can
also cause the grease to spread over the processor pins or the system board base, which can cause
electrical shorts that damage the system.
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