g. USB board (see USB board on page 83).
h. System board (see
System board on page 79).
Remove the power connector cable:
1. Remove the Phillips PM2.5×7.0 screw (1) that secures the power connector and bracket (2) to the
base enclosure.
2. Remove the power connector cable (3).
Reverse this procedure to install the power connector cable.
Fan/heat sink assembly
NOTE: The fan/heat sink assembly spare kit includes replacement thermal material.
Description Spare part number
For use only with computer models equipped with graphics subsystems with discrete memory 516876-001
For use only with computer models equipped with graphics subsystems with UMA memory 516331-001
NOTE: To properly ventilate the computer, allow at least a 7.6-cm (3-inch) clearance on the right side
and rear panel 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 fan/heat sink assembly, 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.
Component replacement procedures 89
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