HP Pavilion G4 1000 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 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 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)
When replacing the system board, be sure that the following components are removed from
the defective system board and installed on the replacement system board:
●Memory module (see 
Memory module on page 53)
●RTC battery (see 
RTC battery on page 77)
●Fan and heat sink (see 
Fan and heat sink on page 79)
●Processor (see 
Processor on page 84)
Component replacement procedures 73 
						

							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.
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							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.
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							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
thermal material is included with all base enclosure and system board spare part kits.
Reverse this procedure to install the system board.
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							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 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 RTC battery:
1.Turn the system board upside down, with the front toward you.
2.Disconnect the RTC battery cable (1) from the system board.
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							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.
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							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 equipped with the AMD RS880MD chipset and a graphics
subsystem with discrete video memory 649952-001649952-001
For use only with computer models equipped with an AMD Athlon, Phenom, Turion, or V-series
processor and a graphics subsystem with discrete video memory639462-001
For use only with computer models equipped with an AMD Athlon, Phenom, Turion, or V-series
processor and a graphics subsystem with UMA video memory639463-001
Heat sink for use only with computer models equipped with an Intel processor:
For use only with computer models equipped with the Intel HM65 or HM55 chipset and a graphics
subsystem with discrete video memory654119-001
For use only with computer models equipped with the Intel HM65 or HM55 chipset and a graphics
subsystem with UMA video memory654120-001
For use only with computer models equipped with an HM65 chipset and a graphics subsystem with
discrete video memory641141-001
For use only with computer models equipped with an HM65 chipset and a graphics subsystem with
UMA video memory641140-001
For use only with computer models equipped with an HM55 chipset and a graphics subsystem with
discrete video memory637190-001
For use only with computer models equipped with an HM55 chipset and a graphics subsystem with
UMA video memory637189-001
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 fan and 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 79 
						

							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 heat sink:
1.Turn the system board upside down, with the front toward you.
NOTE:Steps 2 through 4 apply to computer models equipped with an AMD processor. See
steps 5 through 7 for heat sink removal information for computer models equipped
with an Intel processor.
2.Disconnect the fan cable (1) from the system board.
3.Remove the three Phillips PM2.5×5.0 screws (2) and the three 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.
4.Remove the fan and heat sink (4).
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							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 subsystem chip (5) and the heat sink section (6) that
services it (only on computer models equipped with a graphics subsystem with
discrete memory)
NOTE:Steps 5 through 7 apply to computer models equipped with an Intel processor. See
steps 2 through 4 for heat sink removal information for computer models equipped
with an AMD processor.
5.Disconnect the fan cable (1) from the system board.
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							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 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 graphics subsystem chip (3) and the heat sink section (4) that
services it (only on computer models equipped with a graphics subsystem with
discrete memory)
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