HP 240 Maintenance And Service Manual page 95

Hp 450 notebook pc and hp 455 notebook pc maintenance and service guide
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Description
System board for use only with computer models equipped with an Intel Pentium or Celeron
processor and a graphics subsystem with UMA video memory
For use in models without Windows 8
For use in models with Windows 8 Standard
For use in models with Windows 8 Professional
System board for use only with computer models equipped with an Intel Pentium or Celeron
processor and a graphics subsystem with UMA video memory (RCTO system board for use in
Brazil and India only)
For use in models without Windows 8
For use in models with Windows 8 Standard
For use in models with Windows 8 Professional
Thermal pad (for use with all models)
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 following components:
WLAN module (see
Hard drive (see
Keyboard (see
Top cover (see
Speakers (see
USB board (see
Power connector cable (see
6.
Disconnect the display cable from the system board (see
NOTE:
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
RTC battery (see
Battery on page
WLAN module on page
Hard drive on page
Keyboard on page
60)
Top cover on page
63)
Speakers on page
71)
USB board on page
Power connector cable on page
Memory module on page
RTC battery on page
57)
41).
49)
54)
73)
Display assembly on page
52)
Component replacement procedures
Spare part number
685768-001
685768-501
685768-601
685783-001
685783-501
685783-601
651046-001
75)
77).
87

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