Specifications

Heat sink
NOTE: All heat sink spare part kits include thermal material.
Description Spare part number
For use with system boards spare part numbers 446403-001 and 446404-001 446446-001
For use with system board spare part number 446402-001 446447-001
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 40).
5. Remove the keyboard (see
Keyboard on page 55).
6. Remove the switch cover (see
Switch cover on page 62).
7. Remove the fan assembly (see
Fan assembly on page 64).
Remove the heat sink:
1. Loosen the four Phillips PM2.0×10.0 screws (1) that secure the heat sink to the system board.
Component replacement procedures 65