System board
NOTE: The system board spare part kit includes replacement thermal material.
Description Spare part number
System board for use in computers that include a WWAN module:
GL47 system board with UMA graphics subsystem memory 535858-001
GL40 system board with UMA graphics subsystem memory 535857-001
System board with discrete graphics subsystem memory 535756-001
System board for use in computers that do not include a WWAN module:
GL47 system board with UMA graphics subsystem memory 574510-001
GL40 system board with UMA graphics subsystem memory 574509-001
System board with discrete graphics subsystem memory 574508-001
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 58).
5. Remove the following components:
a. Switch cover and keyboard (see
Switch cover and keyboard on page 59)
b. Speakers (see
Speakers on page 67)
c. WWAN module (see
WWAN module on page 68)
d. Palm rest (see
Palm rest on page 69)
e. WLAN module (see
WLAN module on page 74)
f. Hard drive (see
Hard drive on page 72)
g. Optical drive (see
Optical drive on page 64)
h. Display assembly (see
Display assembly on computers with 15-in displays on page 77 or
Display assembly on computers with 14-in displays on page 90)
i. Top cover (see
Top cover on page 83)
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 63)
●
WLAN module (see
WLAN module on page 74)
Component replacement procedures 105
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