Compaq 325 and 326 Notebook PCs HP 425 and 625 Notebook PCs - Maintenance and Service Guide

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