HP 625 Compaq 325 and 326 Notebook PCs HP 425 and 625 Notebook PCs - Maintenan - Page 100

System board, Heat sink see

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System board NOTE: The system board spare part kit includes replacement thermal material. Description System board with UMA graphics and RTC battery with RS880M chipset System board with discrete graphics and RTC battery with RS880M chipset Spare part number 611803-001 611802-001 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). 5. Remove the service door (see Service door on page 49). 6. Remove the hard drive (see Hard drive on page 51). 7. Remove the optical drive (see Optical drive on page 57). 8. Remove the fan (see Fan on page 59). 9. Remove the palm rest (see Palm rest on page 64). 10. Remove the keyboard (see Keyboard on page 67). 11. Remove the top cover (see Top cover on page 71). 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 54) ● WLAN module (see WLAN module on page 55) ● Modem module (see Modem module on page 97) ● Heat sink (see Heat sink on page 60) ● Processor (see Processor on page 62) ● Audio board (see Audio board on page 99) Remove the system board on a 39.6-cm (15.6-in) computer: 1. Position the computer with the front toward you. 2. Release the audio ZIF connector (1) and disconnect the cable (2) from the left edge of the system board. 90 Chapter 4 Removal and replacement procedures

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System board
NOTE:
The system board spare part kit includes replacement thermal material.
Description
Spare part number
System board with UMA graphics and RTC battery with RS880M chipset
611803-001
System board with discrete graphics and RTC battery with RS880M chipset
611802-001
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
).
5.
Remove the service door (see
Service door
on page
49
).
6.
Remove the hard drive (see
Hard drive
on page
51
).
7.
Remove the optical drive (see
Optical drive
on page
57
).
8.
Remove the fan (see
Fan
on page
59
).
9.
Remove the palm rest (see
Palm rest
on page
64
).
10.
Remove the keyboard (see
Keyboard
on page
67
).
11.
Remove the top cover (see
Top cover
on page
71
).
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
54
)
●
WLAN module (see
WLAN module
on page
55
)
●
Modem module (see
Modem module
on page
97
)
●
Heat sink (see
Heat sink
on page
60
)
●
Processor (see
Processor
on page
62
)
●
Audio board (see
Audio board
on page
99
)
Remove the system board on a
39.6-cm
(15.6-in) computer:
1.
Position the computer with the front toward you.
2.
Release the audio ZIF connector
(1)
and disconnect the cable
(2)
from the left edge of the
system board.
90
Chapter 4
Removal and replacement procedures