HP ProBook 6445b - Notebook PC, Руководство по техническому обслуживанию и ремонту

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4–40 Maintenance and Service Guide
Removal and replacement procedures
Heat sink
✎
The heat sink spare part kit includes replacement thermal material.
Before removing the heat sink, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on,
and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet, and then
unplugging the AC adapter from the computer.
4. Remove the battery (see “Battery” on page 4-7 ).
5. Remove the following components:
a. Keyboard (see “Keyboard” on page 4-25 )
b. Switch cover (see “Switch cover” on page 4-33 )
c. Fan (see “Fan” on page 4-39 )
Description Spare part number
For use only with HP Compaq 6545b and 6445b computer models 583265-001
For use only with HP Compaq 6540b and 6440b computer models equipped with discrete graphics
subsystem memory 593879-001
For use only with HP Compaq 6540b and 6440b computer models equipped with UMA graphics
subsystem memory 593878-001