HP Presario CQ57-200 Compaq Presario CQ57 Notebook PC - Maintenance and Servic - Page 75

System board, Top cover see

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System board NOTE: The system board spare part kit includes replacement thermal material. Replacement thermal material is also available in the Thermal Material Kit, spare part number 646135-001. Description For use only with computer models equipped with an Intel Pentium processor and a graphics subsystem with discrete video memory For use only with computer models equipped with an Intel Pentium processor and a graphics subsystem with UMA video memory For use only with computer models equipped with an Intel Celeron processor and a graphics subsystem with UMA video memory Spare part number 646176-001 646175-001 646174-001 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 35). 5. Remove the optical drive (see Optical drive on page 36). 6. Remove the WLAN module (see WLAN module on page 39). 7. Disconnect the hard drive connector cable from the system board (see Hard drive on page 42). 8. Remove the following components: ● Keyboard (see Keyboard on page 45) ● Top cover (see Top cover on page 48) ● USB board (see USB board on page 55) ● Power connector cable (see Power connector cable on page 56) ● Display assembly (see Display assembly on page 60) 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 41) ● RTC battery (see RTC battery on page 70) Component replacement procedures 67

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System board
NOTE:
The system board spare part kit includes replacement thermal material.
Replacement thermal material is also available in the Thermal Material Kit, spare part number
646135-001.
Description
Spare part number
For use only with computer models equipped with an Intel Pentium processor and a graphics
subsystem with discrete video memory
646176-001
For use only with computer models equipped with an Intel Pentium processor and a graphics
subsystem with UMA video memory
646175-001
For use only with computer models equipped with an Intel Celeron processor and a graphics
subsystem with UMA video memory
646174-001
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
35
).
5.
Remove the optical drive (see
Optical drive
on page
36
).
6.
Remove the WLAN module (see
WLAN module
on page
39
).
7.
Disconnect the hard drive connector cable from the system board (see
Hard drive
on page
42
).
8.
Remove the following components:
●
Keyboard (see
Keyboard
on page
45
)
●
Top cover (see
Top cover
on page
48
)
●
USB board (see
USB board
on page
55
)
●
Power connector cable (see
Power connector cable
on page
56
)
●
Display assembly (see
Display assembly
on page
60
)
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
41
)
●
RTC battery (see
RTC battery
on page
70
)
Component replacement procedures
67