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3. Lift the system board (1) , and then remove the system board (2) by sliding it up and to the right
at an angle.
Reverse this procedure to install the system board.
Heat sink
Description Spare part number
For use only on computer models equipped with the Intel HM87 Express Chipset and an Nvidia
N14P-GT (GeForce 750M) graphics subsystem
720233-001
For use only on computer models equipped with the Intel HM87 Express Chipset and an Nvidia
N14P-GV2 (GeForce 740M) graphics subsystem
720232-001
For use only on computer models equipped with the Intel HM87 Express Chipset and a graphics
subsystem with UMA memory
720231-001
For use only on computer models equipped with the Intel HM77 Express chipset and an Nvidia
N14P-GV2 (GeForce 740M) graphics subsystem
720234-001
For use only on computer models equipped with the Intel HM77 Express chipset and a graphics
subsystem with UMA memory
722381-001
NOTE: To properly ventilate the computer, allow at least 7.6 cm (3 in) of 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 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.
Component replacement procedures
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