HP G42-300 Compaq Presario CQ42 Notebook PC and HP G42 Notebook PC - Maintenan - Page 83

System board, the computer on, and then shut it down through the operating system.

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System board Description Spare part number System board for use in models with UMA graphics subsystem memory, 592808-001 System board for use in models with DSC HD5430 MDM CR (for model 1.0 only) 592811-001 System board for use in models with DSC HD5430 (for model 1.0 only) 592810-001 System board for use in models with UMA graphics subsystem memory 592809-001 System board for use in models with HD545V DSC (for model 1.0 only) 611554-001 System board for use in models with HD545V DSC CR (for model 1.0 only) 611555-001 System board for use in models with discrete graphics subsystem with HD5470/512 MB (for model 1.1 only) 616405-001 System board for use in models with discrete graphics subsystem with HD5470/512 MB with HDMI card reader (for model 1.1 only) 616406-001 System board for use in models with discrete graphics subsystem with HD5470/1 G (for model 1.1 616407-001 only) System board for use in models with discrete graphics subsystem with HD5470/1 G with HDMI card reader (for model 1.1 only) 616408-001 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: ● RTC battery (see RTC battery on page 78) ● Memory modules (see Memory module on page 51) ● WLAN module (see WLAN module on page 49) ● Modem module (see Modem module on page 61) 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 43). 5. Remove the following components: a. Hard drive (see Hard drive on page 44) b. WLAN (see WLAN module on page 49) c. Optical drive (see Optical drive on page 47) d. Keyboard (see Keyboard on page 53) e. Top cover (see Top cover on page 55) Component replacement procedures 73

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System board
Description
Spare part number
System board for use in models with UMA graphics subsystem memory,
592808-001
System board for use in models with DSC HD5430 MDM CR (for model 1.0 only)
592811-001
System board for use in models with DSC HD5430 (for model 1.0 only)
592810-001
System board for use in models with UMA graphics subsystem memory
592809-001
System board for use in models with HD545V DSC (for model 1.0 only)
611554-001
System board for use in models with HD545V DSC CR (for model 1.0 only)
611555-001
System board for use in models with discrete graphics subsystem with HD5470/512 MB (for
model 1.1 only)
616405–001
System board for use in models with discrete graphics subsystem with HD5470/512 MB with
HDMI card reader (for model 1.1 only)
616406–001
System board for use in models with discrete graphics subsystem with HD5470/1 G (for model 1.1
only)
616407–001
System board for use in models with discrete graphics subsystem with HD5470/1 G with HDMI
card reader (for model 1.1 only)
616408–001
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:
●
RTC battery (see
RTC battery
on page
78
)
●
Memory modules (see
Memory module
on page
51
)
●
WLAN module (see
WLAN module
on page
49
)
●
Modem module (see
Modem module
on page
61
)
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
43
).
5.
Remove the following components:
a.
Hard drive (see
Hard drive
on page
44
)
b.
WLAN (see
WLAN module
on page
49
)
c.
Optical drive (see
Optical drive
on page
47
)
d.
Keyboard (see
Keyboard
on page
53
)
e.
Top cover (see
Top cover
on page
55
)
Component replacement procedures
73