Installing The Heatsink - HP P5389A - Intel Pentium III-S 1.4 GHz Processor Upgrade Maintenance Manual

Chapter 3

Installing the Heatsink

Once the processor is installed, the cooling fan-heatsink must be installed on top of the processor. Each
processor requires a heatsink, with its cooling fan attached, and a thermal interface material (grease) between
the processor and the heatsink. The heatsink is mechanically connected to the processor socket with both
latches, mechanically making contact with processor. HP recommends you do not reuse a heatsink.
1. Remove the heatsink-fan assembly from the shipping container and ensure you do not touch the thermal
interface material on the bottom of the heatsink.
2. Ensure the latches are free and pointing away from the heatsink.
3. Position the heatsink over the second processor and:
a. Tilt or roll it slightly to the rear of the chassis to help engage the hook latch and then connect the
hook latch to the tab.
CAUTION Take care not to move the nearby capacitors.
b. Rotate the heatsink back, placing it squarely on top of the processor and connect the thumb latch to
the tabs on the base of the processor socket on the side shown in Figure 3-19.
The rail and guide on the heatsink bottom will help you to center the heatsink.
CAUTION Do not apply too much force when connecting the thumb latch to the tab on the base of
the processor socket, otherwise, you may damage the components on the system board.
The thumb latches hook underneath the tabs extending from the base of the processor socket base.
c. Ensure the ridge on the bottom of the heatsink rests between the processor and the edge of the
processor socket base.
CAUTION Ensure you have made good contact with the processor to avoid thermal overheating. If
you have not made good contact, the processor will overheat within 20 seconds of power
on and will shut down, possibly causing damage to the processor.
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Figure 3-19. Installing Heatsink
Installing and Configuring