HP COMPAQ PRESARIO G42, Maintenance And Service Manual

Page: 88 / 143

System board
Description Spare part number
System board for use in models with discrete graphics subsystem 595181-001
System board for use in models with Unified Memory Architecture (UMA) graphics subsystem 595182-001
System board for use in models with discrete graphics subsystem and HDMI card reader 595183-001
System board for use in models with UMA graphics subsystem and HDMI card reader 595184-001
System board for use in models with UMA graphics subsystem memory, Intel® GL40 chipset, and
HDMI card reader 605140-001
For use in models with UMA graphics subsystem memory, 592808-001
For use in models with DSC HD5430 MDM CR 592811-001
For use in models with DSC HD5430 592810-001
For use in models with UMA graphics subsystem memory, 592809-001
For use in models with HD545V DSC 611554-001
For use in models with HD545V DSC CR 611555-001
For use in models with discrete graphics subsystem HM55 HD5430/1G 608823–001
For use in models with discrete graphics subsystem HDMI HD5430/1G 608824–001
For use in models with discrete graphics subsystem with HM55 HD545V 615577–001
For use in models with discrete graphics subsystem with HM55 HDMI HD545V 615578–001
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 85 )
●
Memory modules (see Memory module on page 54 )
●
WLAN module (see WLAN module on page 51 )
●
Modem module (see Modem module on page 65 )
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.
80 Chapter 4 Removal and replacement procedures