HP Pavilion G4 1100 Notebook Pc Series Service Guide

DescriptionSpare part number
For use only with computer models equipped with an HM55 chipset and a graphics subsystem with
512-MB of discrete video memory636371-001
For use only with computer models equipped with an HM65 chipset and a graphics subsystem with
UMA video memory636373-001
For use only with computer models equipped with an HM55 chipset and a graphics subsystem with
UMA video memory636370-001
Before removing the system board, follow these steps:
1.Shut down the computer. If you are unsure...

Remove the system board:
1.Disconnect the following cables from the system board:
(1) LED board cable
(2) Speaker cable
(3) Optical drive cable
(4) Display panel cable
2.Disconnect the power connector cable (1) from the system board.
74 Chapter 4   Removal and replacement procedures 

3.Release the ZIF connector to which the USB board cable is attached, and then disconnect
the USB cable (2) from the system board.
4.Remove the Phillips PM2.5×6.0 screw (1) that secures the system board to the base enclosure.
5.Lift the right side of the system board (2) until it rests at an angle.
Component replacement procedures 75 

6.Remove the system board (3) by sliding it up and to the right at an angle.
NOTE:System boards for use with computer models equipped with an AMD processor have
the Southbridge chip located on the bottom of the board. A thermal pad is used on
the Southbridge chip (1) and the base enclosure heat sink (2) that services it. The
thermal material must be thoroughly cleaned from the surfaces of the system board and the heat
sink attached to the base enclosure each time the system board is removed. Replacement...

RTC battery
DescriptionSpare part number
RTC battery (includes cable and double-sided tape) 637193-001
Before removing the RTC battery, 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...

3.Remove the RTC battery (2) from the system board. (The RTC battery is attached to the system
board with double-sided tape.)
Reverse this procedure to install the RTC battery.
78 Chapter 4   Removal and replacement procedures 

Fan and heat sink
NOTE:The fan and heat sink spare part kits include replacement thermal material.
DescriptionSpare part number
Fan639460-001
Heat sink for use only with computer models equipped with an AMD processor:
For use only with computer models equipped with the AMD A60M chipset and a graphics
subsystem with discrete video memory649953-001
For use only with computer models equipped with the AMD A60M chipset and a graphics
subsystem with UMA video memory649954-001
For use only with computer models...

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 48), and then remove the following components:
●Optical drive (see 
Optical drive on page 49)
●Hard drive (see 
Hard drive on page 51)
●WLAN module (see 
WLAN module on page 54)
●Keyboard (see 
Keyboard on page 56)
●Top cover (see 
Top cover on page 59)
●System board (see 
System board on page 72)
Remove the fan and...

NOTE:The thermal material must be thoroughly cleaned from the surfaces of the heat sink
and the system board components each time the heat sink is removed. Replacement
thermal material is included with the base enclosure, heat sink, processor, and system board
spare part kits.
●Thermal paste is used on the processor (1) and the heat sink section (2) that services it
●A thermal pad is used on the Northbridge chip (3) and the heat sink section (4) that
services it
●A thermal pad is used on the graphics...

6.Remove the three Phillips PM2.5×5.0 screws (2) and the four Phillips PM2.5×10.0 spring-loaded
screws (3) that secure the heat sink to the system board.
NOTE:Due to the adhesive quality of the thermal material located between the heat sink and
system board components, it may be necessary to move the heat sink from side to side to
detach it.
7.Remove the fan and heat sink (4).
NOTE:The thermal material must be thoroughly cleaned from the surfaces of the heat sink
and the system board components each time...