HP 110 - Manual (Page 78)

Fan and sink
Description Spare part number
Fan 651897-001
Heat sink (includes replacement thermal material) 651898-001
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 fan or 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 44 ).
5. Remove the service door (see Service door on page 45 ).
6. Disconnect the hard drive cable from the system board (see Hard drive on page 50 ).
7. Disconnect the WLAN antenna cables from the WLAN module (see WLAN module on page 46 ).
8. Disconnect the WWAN antenna cables from the WWAN module (see WWAN module
on page 47 ).
9. Remove the following components:
a. Keyboard (see Keyboard on page 53 ).
b. Top cover (see Top cover on page 56 ).
c. System board (see System board on page 67 ).
Remove the fan:
1. Position the system board upside down, with the front toward you.
2. Disconnect the fan cable (1) from the system board.
3. Remove the two Phillips M2.0x4.0 screws (2) that secure the fan to the system board .
70 Chapter 4 Removal and replacement procedures