System Board - HP 321 - Notebook PC Maintenance And Service Manual

System board

NOTE: The system board spare part kit includes replacement thermal material.
Description
System board with UMA graphics and RTC battery with GL40 chipset having 667-MHz FSB
System board with UMA graphics and RTC battery with GM45 chipset having 1066-MHz FSB
System board with discrete graphics and RTC battery with PM45 chipset having 1066-MHz FSB
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
5. Remove the service door (see
6. Remove the hard drive (see
7. Remove the optical drive (see
8. Remove the fan (see
9. Remove the palm rest (see
10. Remove the keyboard (see
11. Remove the top cover (see
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
●
WLAN module (see
●
Modem module (see
●
Heat sink (see
● Processor (see
●
Audio board (see
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.
92 Chapter 4 Removal and replacement procedures
Battery on page
Service door on page
Hard drive on page
Optical drive on page
Fan on page 60).
Palm rest on page
Keyboard on page
Top cover on page
Memory module on page
WLAN module on page
Modem module on page
Heat sink on page 61)
Processor on page 62)
Audio board on page
49).
49).
52).
58).
64).
69).
73).
55)
57)
99)
100)
Spare part number
605748-001
605747-001
605746-001