HP G72 Notebook PC - Maintenance and Service Guide

System board
NOTE: The system board spare part kit includes UMA or discrete graphics subsystem memory and
replacement thermal material.
Description Spare part number
HD 5430/1 G discrete system board with card reader 1.1 (for model 1.1 only) 615847-001
HD 5430/512 MB discrete system board with card reader 1.1 (for model 1.1 only) 615848-001
HD 5430/512 MB discrete system board with card reader (for model 1.0 only) 629120-001
HD 5430/1 G discrete system board with card reader (for model 1.0 only) 629121-001
HD UMA system board with card reader (for model 1.2 only) 629122-001
HD 1G discrete system board with card reader (for model 1.2 only) 630948-001
HD 512 MB discrete system board with card reader (for model 1.2 only) 630949-001
HD UMA system board with card reader (for model 1.2 only) 630950-001
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 52)
●
Memory modules (see
Memory module on page 51)
●
WLAN module (see
WLAN module on page 48)
●
Modem module (see
Modem module on page 63)
Before removing the system board:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn on
the computer, 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 disconnecting the power cord from the AC
outlet and then disconnecting the AC adapter from the computer.
4. Remove the battery (see
Battery on page 42).
5. Remove the following components:
a. Hard drive (see
Hard drive on page 43)
b. Optical drive (see
Optical drive on page 46)
c. WLAN module (see
WLAN module on page 48)
d. Memory module (see
Memory module on page 51)
e. RTC battery (see
RTC battery on page 52)
f. Keyboard (see
Keyboard on page 54)
g. Top cover (see
Top cover on page 57)
ENWW Component replacement procedures 75