HP Pavilion dm4-2100 HP Pavilion dm4 Entertainment PC Maintenance and Service - Page 80

System board, and then unplugging the AC adapter from the computer.

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System board NOTE: All system board kits include replacement thermal material. NOTE: System boards with the processor already installed, as well as without the processor, are available for this computer. Description System board (includes replacement thermal material) for use in models equipped with 1 GB of HD6470 discrete graphics memory System board with HM65 UMA graphics memory System board with HM65 UMA graphics memory; includes Intel i3 2330M processor System board with HM65 UMA graphics memory; includes Intel i3 2310M processor Spare part number 636944-001 636945-001 642732-001 656092-001 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: ● RTC battery (see RTC battery on page 41) ● Memory modules (see Memory module on page 39) ● WLAN module (see WLAN module on page 42) ● Fan/heat sink assembly (see Fan/heat sink assembly on page 74) ● Processor (see Processor on page 79) NOTE: Only for system boards that do not come with the processor installed. 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 38). 5. Remove the following components: a. Hard drive (see Hard drive on page 45) b. WLAN module (see WLAN module on page 42) c. Optical drive (see Optical drive on page 47) d. Keyboard (see Keyboard on page 49) e. Top cover (see Top cover on page 51) 72 Chapter 4 Removal and replacement procedures

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System board
NOTE:
All system board kits include replacement thermal material.
NOTE:
System boards with the processor already installed, as well as without the processor, are
available for this computer.
Description
Spare part number
System board (includes replacement thermal material) for use in models equipped with 1 GB of
HD6470 discrete graphics memory
636944-001
System board with HM65 UMA graphics memory
636945-001
System board with HM65 UMA graphics memory; includes Intel i3 2330M processor
642732-001
System board with HM65 UMA graphics memory; includes Intel i3 2310M processor
656092-001
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:
●
RTC battery (see
RTC battery
on page
41
)
●
Memory modules (see
Memory module
on page
39
)
●
WLAN module (see
WLAN module
on page
42
)
●
Fan/heat sink assembly (see
Fan/heat sink assembly
on page
74
)
●
Processor (see
Processor
on page
79
)
NOTE:
Only for system boards that do not come with the processor installed.
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
38
).
5.
Remove the following components:
a.
Hard drive (see
Hard drive
on page
45
)
b.
WLAN module (see
WLAN module
on page
42
)
c.
Optical drive (see
Optical drive
on page
47
)
d.
Keyboard (see
Keyboard
on page
49
)
e.
Top cover (see
Top cover
on page
51
)
72
Chapter 4
Removal and replacement procedures