HP Pavilion Tx1200 Notebook Pc Series Service Guide

							
System board
DescriptionSpare part number
For use only with computer models equipped with WWAN441097-001
For use only with computer models not equipped with WWAN 441096-001
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 43
)
● WLAN module (see 
WLAN module on page 44
)
● RTC battery (see 
RTC battery on page 62
)
● Bluetooth module (see 
Bluetooth module on page 65
)
● Fan/heat sink assembly (see 
Fan/heat sink assembly on page 71
)
● Processor (see 
Processor on page 74
)
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 device
s connected to the computer.
3 . Disconnect the power cord.
4 . Remove the battery (see 
Battery on page 36
).
5 . Remove the following components:
a
. Hard drive (see 
Hard drive on page 38
)
b . Memory module compartment cover (see 
Memory module on page 43
)
c . Optical drive (see 
Optical drive on page 42
)
d . Keyboard (see 
Keyboard on page 47
)
e . Switch cover (see 
Switch cover on page 50
)
f . Display assembly (see 
Display assembly on page 52
)
g . Top cover (see 
Top cover on page 59
)
h . Power switch assembly (see 
Power switch assembly on page 63
)
Remove the system board:
1 . Disconnect the ZIF connector  (1) to which the audio/infrared board cable is attached and disconnect
the audio/infrared board cable  (2) from the system board.
2 . Press in on the ExpressCard slot bezel  (3) to release the bezel from the ExpressCard slot.
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3. Remove the ExpressCard slot bezel  (4) from the ExpressCard slot.
NOTE: The ExpressCard slot bezel is included in the Plastics Kit, spare part number
441138-001.
4 . Use the optical drive connector  (1) to lift the left side of the system board  (2) until the power connector
(3)  is clear of the base enclosure.
5 . Pull the system board  (4) away from the top cover at an angle and remove it.
Reverse this procedure to install the system board.
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Pen holder
DescriptionSpare part number
Pen holder441146-001
Pen eject assembly 441145-001
Before removing the pen holder, 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 device
s connected to the computer.
3 . Disconnect the power cord.
4 . Remove the battery (see 
Battery on page 36
).
5 . Remove the following components:
a
. Pen (see 
Pen on page 37
)
b . Hard drive (see 
Hard drive on page 38
)
c . Memory module compartment cover (see 
Memory module on page 43
)
d . Optical drive (see 
Optical drive on page 42
)
e . Keyboard (see 
Keyboard on page 47
)
f . Switch cover (see 
Switch cover on page 50
)
g . Display assembly (see 
Display assembly on page 52
)
h . Top cover (see 
Top cover on page 59
)
i . Power switch assembly (see 
Power switch assembly on page 63
)
j . System board (see 
System board on page 66
).
Remove the pen holder:
1 . Remove the Phillips PM2.0×5.0 screw  (1) that secures the pen eject as sembly to the base enclosure.
2 . Remove the pen eject assembly  (2).
3 . Remove the two Phillips PM2.0×5.0 screws  (3) that secure the pen holder to the base enclosure.
68 Chapter  5   Removal and replacement procedures ENWW 
						

							
4. Remove the pen holder  (4).
Reverse this procedure to install the pen holder.
Audio/infrared board
DescriptionSpare part number
Audio/infrared board (includes au dio/infrared board cable) 441144-001
Before removing the audio/infrared 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 device
s connected to the computer.
3 . Disconnect the power cord.
4 . Remove the battery (see 
Battery on page 36
).
5 . Remove the following components:
a
. Hard drive (see 
Hard drive on page 38
)
b . Memory module compartment cover (see 
Memory module on page 43
)
c . Optical drive (see 
Optical drive on page 42
)
d . Keyboard (see 
Keyboard on page 47
)
e . Switch cover (see 
Switch cover on page 50
)
f . Display assembly (see 
Display assembly on page 52
)
g . Top cover (see 
Top cover on page 59
)
h . Power switch assembly (see 
Power switch assembly on page 63
)
ENWW Component replacement procedures 69 
						

							
i. System board (see System board on page 66
)
j . Pen holder (see 
Pen holder on page 68
).
Remove the audio/infrared board:
1 . Remove the two Phillips PM2.0×5.0 screws  (1) that secure the audio/infrared board to the system
board.
2 . Release the audio/infrared board  (2) by sliding it away from you until the connectors on the front
of the board disengage from the  openings in the base enclosure.
3 . Remove the audio/infrared board  (3).
Reverse this procedure to inst all the audio/infrared board.
WWAN external antenna board
NOTE:The WWAN external antenna board and WWA N external antenna board cable are
included with the base enclosure for use only  with computer models equipped WWAN, spare part
number 441136-001.
Before removing the WWAN external  antenna 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 device
s connected to the computer.
3 . Disconnect the power cord.
4 . Remove the battery (see 
Battery on page 36
).
5 . Remove the following components:
a
. Hard drive (see 
Hard drive on page 38
)
b . Memory module compartment cover (see 
Memory module on page 43
)
c . Optical drive (see 
Optical drive on page 42
)
70 Chapter  5   Removal and replacement procedures ENWW 
						

							
d. Keyboard (see Keyboard on page 47
)
e . Switch cover (see 
Switch cover on page 50
)
f . Display assembly (see 
Display assembly on page 52
)
g . Top cover (see 
Top cover on page 59
)
h . Power switch assembly (see 
Power switch assembly on page 63
)
i . System board (see 
System board on page 66
)
Remove the WWAN antenna board:
1 . Remove the two Phillips PM2.0×4.0 screws  (1) that secure the WWAN external antenna board to
the base enclosure.
2 . Remove the WWAN external antenna board and cable  (2).
Reverse this procedure to install the WWAN external antenna board.
Fan/heat sink assembly
DescriptionSpare part number
Fan/heat sink assembly (includes thermal paste and thermal pads) 441143-001
NOTE: To properly ventilate the computer, allow at le ast 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 conditio ns are affected by high external temperatures, system power
consumption, power management/battery conservat ion configurations, battery fast charging, and
software applications. Exhaust air is displaced thro ugh the ventilation grill located on the left side
of the computer.
ENWW Component replacement procedures 71 
						

							
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 device
s connected to the computer.
3 . Disconnect the power cord.
4 . Remove the battery (see 
Battery on page 36
).
5 . Remove the following components:
a
. Hard drive (see 
Hard drive on page 38
)
b . Memory module compartment cover (see 
Memory module on page 43
)
c . Optical drive (see 
Optical drive on page 42
)
d . Keyboard (see 
Keyboard on page 47
)
e . Switch cover (see 
Switch cover on page 50
)
f . Display assembly (see 
Display assembly on page 52
)
g . Top cover (see 
Top cover on page 59
)
h . Power switch assembly (see 
Power switch assembly on page 63
)
i . System board (see 
System board on page 66
)
Remove the fan/heat assembly:
1 . Disconnect the fan cable  (1) from the system board.
2 . Remove the four Phillips PM2.0×5.0 screws  (2) that secure the fan/heat sink assembly to the system
board.
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3. Remove the fan/heat sink assembly  (3).
NOTE: Due to the adhesive quality of the therma l paste and thermal pads located between
the fan/heat sink assembly and system board co mponents, it may be necessary to move the
fan/heat sink assembly from side  to side to detach the assembly.
NOTE:The thermal paste and thermal pads should be  thoroughly cleaned from the surfaces of
the fan/heat sink assembly  (1) and the system board components  (2) each time the fan/heat sink
assembly is removed. Thermal pas te and thermal pads are included with all system board, fan/
heat sink assembly, and processor spare part kits.
Reverse this procedure to insta ll the fan/heat sink assembly.
ENWW Component replacement procedures 73 
						

							
Processor
NOTE:All processor spare part kits include thermal paste.
DesriptionSpare part number
AMD Turion 64 Mobile Technology TL-60 processor (2.0-GHz, 1-MB L2 cache)436257-001
AMD Turion 64 Mobile Technology TL-56 processor (1.8-GHz, 1-MB L2 cache)431373-001
AMD Turion 64 Mobile Technology TL-52 processor (1.6-GHz, 1-MB L2 cache)431372-001
AMD Turion 64 Mobile Technology TL-50 processor (1.6-GHz, 512-KB L2 cache)431371-001
AMD Turion 64 Mobile Technology MK-36 pr ocessor (2.0-GHz, 512-KB L2 cache) 437803-001
Before removing the processor, 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 device
s connected to the computer.
3 . Disconnect the power cord.
4 . Remove the battery (see 
Battery on page 36
).
5 . Remove the following components:
a
. Hard drive (see 
Hard drive on page 38
)
b . Memory module compartment cover (see 
Memory module on page 43
)
c . Optical drive (see 
Optical drive on page 42
)
d . Keyboard (see 
Keyboard on page 47
)
e . Switch cover (see 
Switch cover on page 50
)
f . Display assembly (see 
Display assembly on page 52
)
g . Top cover (see 
Top cover on page 59
)
h . Power switch assembly (see 
Power switch assembly on page 63
)
i . System board (see 
System board on page 66
)
Remove the processor:
1 . Use a flat-bladed screwdriver to  turn the processor locking screw  (1) one-half turn counterclockwise
until you hear a click.
74 Chapter  5   Removal and replacement procedures ENWW 
						

							
2. Lift the processor  (2) straight up and remove it.
NOTE: The gold triangle  (3) on the processor should be aligned with the triangle  (4)
embossed on the processor socket when you install the processor.
Reverse this procedure to install the processor.
ENWW Component replacement procedures 75