Removal and replacement procedures 4–38
System board
✎
The system board spare part kit includes UMA or discrete graphics subsystem memory, built-in modem, and
replacement thermal material.
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 4-7).
5. Remove the following components:
a. Optical drive (see “Optical drive” on page 4-8)
b. Hard drive (see “Hard drive” on page 4-10)
c. Keyboard (see “Keyboard” on page 4-17)
d. Keyboard cover (see “Keyboard cover” on page 4-20)
e. Power button board (see “Power button board” on page 4-22)
f. Display assembly (see “Display assembly” on page 4-23)
Description Spare part number
UMA system board, GM45 (includes built-in modem, Digital Media Slot, HDMI port,
and replacement thermal material)
485218-001
UMA system board, GM45 (includes built-in modem, Digital Media Slot, and
replacement thermal material)
494281-001
UMA system board, GL40 (includes built-in modem, Digital Media Slot, and
replacement thermal material)
494282-001
UMA system board, GL40 (includes built-in modem, Digital Media Slot, HDMI port, and
replacement thermal material)
485219-001
UMA system board, GL40 (for Presario CQ60 only; includes built-in modem, and
replacement thermal material)
501266-001
Discrete system board, PM45 (includes built-in modem, Digital Media Slot, HDMI port,
and replacement thermal material)
488338-001
Discrete system board, PM45 (includes built-in modem, Digital Media Slot, and
replacement thermal material)
494283-001
UMA system board, NVIDIA (includes built-in modem, Digital Media Slot, HDMI port,
and replacement thermal material)
498460-001
UMA system board, NVIDIA (for Presario only; includes built-in modem, Digital Media
Slot, and replacement thermal material)
498462-001
UMA system board, NVIDIA (for Presario only; includes built-in modem, Digital Media
Slot, and replacement thermal material)
498463-001
UMA system board, NVIDIA (for Presario only; includes built-in modem, and
replacement thermal material)
498464-001
Optical extension board (not illustrated) 506951-001
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