HP G72-257CL Compaq Presario CQ72 Notebook PC and HP G72 Notebook PC - Mainten - Page 86

System board, Remove the top cover see

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Removal and replacement procedures System board ✎ The system board spare part kit includes UMA or discrete graphics subsystem memory and replacement thermal material. Description HM55 discrete system board HM55 UMA system board HM55 HDMI discrete system board HM55 HDMI UMA system board HM55 1.1 discrete system board HM55 1.1 HDMI discrete system board GL40 UMA system board (for model 1.1 only) Spare part number 595181-001 595182-001 595183-001 595184-001 608823-001 608824-001 605139-001 Before removing the system board: 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 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 4-7). 5. Remove the hard drive (see "Hard drive" on page 4-8). 6. Remove the memory module (see "Memory module" on page 4-11). 7. Remove the wireless module (see "Wireless module" on page 4-13). 8. Remove the optical drive (see "Optical drive" on page 4-16). 9. Remove the keyboard (see "Keyboard" on page 4-18). 10. Remove the top cover (see "Top cover" on page 4-23). 11. Remove the display assembly (see "Display assembly" on page 4-28). 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 4-11) ■ Wireless module (see "Wireless module" on page 4-13) ■ Modem module (see "Modem" on page 4-43) ■ Fan/heat sink assembly (see "Fan/heat sink assembly" on page 4-47) ■ Processor (see "Processor" on page 4-53) 4-44 Maintenance and Service Guide

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4–44
Maintenance and Service Guide
Removal and replacement procedures
System board
✎
The system board spare part kit includes UMA or discrete graphics subsystem memory and replacement thermal
material.
Before removing the system board:
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 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 4-7
).
5. Remove the hard drive (see
“Hard drive” on page 4-8
).
6. Remove the memory module (see
“Memory module” on page 4-11
).
7. Remove the wireless module (see
“Wireless module” on page 4-13
).
8. Remove the optical drive (see
“Optical drive” on page 4-16
).
9. Remove the keyboard (see
“Keyboard” on page 4-18
).
10. Remove the top cover (see
“Top cover” on page 4-23
).
11. Remove the display assembly (see
“Display assembly” on page 4-28
).
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 4-11
)
■
Wireless module (see
“Wireless module” on page 4-13
)
■
Modem module (see
“Modem” on page 4-43
)
■
Fan/heat sink assembly (see
“Fan/heat sink assembly” on page 4-47
)
■
Processor (see
“Processor” on page 4-53
)
Description
Spare part number
HM55 discrete system board
595181-001
HM55 UMA system board
595182-001
HM55 HDMI discrete system board
595183-001
HM55 HDMI UMA system board
595184-001
HM55 1.1 discrete system board
608823-001
HM55 1.1 HDMI discrete system board
608824-001
GL40 UMA system board (for model 1.1 only)
605139-001