Graphics board heat sink
Description Spare part number
For use only with computer models equipped with ATi graphics subsystems (includes 5
replacement thermal pads)
596046-001
For use only with computer models equipped with nVidia graphics subsystems (includes
replacement thermal pads and thermal paste)
597571-001
NOTE: To properly ventilate the computer, allow at least a 7.6-cm (3-inch) clearance on the left side
of the computer. The computer uses an electric fan for ventilation. The fan is controlled by a
temperature sensor and is designed to turn on automatically when high temperature conditions exist.
These conditions are affected by high external temperatures, system power consumption, power
management/battery conservation configurations, battery fast charging, and software requirements.
Exhaust air is displaced through the ventilation grill located on the left side of the computer.
Before removing the graphics board 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 46).
5. Remove the keyboard (see
Keyboard on page 61).
6. Remove the switch cover (see
Switch cover on page 65).
Remove the graphics board heat sink:
1. Disconnect the fan cable (1) from the system board.
2. Following the 1, 2, 3, 4, 5, 6 sequence stamped into the graphics board heat sink, loosen the six
Phillips captive screws (2) that secure the graphics board heat sink to the system board.
3. Lift the front edge of the graphics board heat sink (3) until it rests at an angle.
NOTE: Due to the adhesive quality of the thermal material located between the graphics board
heat sink and graphics board components, it may be necessary to move the graphics board heat
sink from side to side to detach it from the system board.
ENWW Component replacement procedures 67
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General
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