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Removal and replacement procedures
Maintenance and Service Guide 4–35
System board and optical drive connector board
✎
The system board spare part kit includes 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 4-6).
5. Remove the following components:
a. Hard drive (see “Hard drive” on page 4-8)
b. Optical drive (see “Optical drive” on page 4-18)
c. Keyboard and switch cover (see “Keyboard and switch cover” on page 4-20)
d. Speaker (see “Speaker” on page 4-24)
e. Display assembly (see “Display assembly” on page 4-25)
f. Top cover (see “Top cover” on page 4-32)
6. Disconnect the Bluetooth module cable from the system board (see “Bluetooth module” on page 4-34).
When replacing the system board, be sure that the following additional components are removed from the defective
system board and installed on the replacement system board:
■ WLAN module (see “WLAN module” on page 4-12)
■ Memory modules (see “Memory module” on page 4-16)
■ RTC battery (see “RTC battery” on page 4-40)
■ Modem module (see “Modem module” on page 4-42)
■ Heat sink (see “Heat sink” on page 4-44)
■ Modem module cable (see “Modem module cable” on page 4-48)
■ Processor (see “Processor” on page 4-49)
Description Spare part number
For use only on computer models equipped with an AMD processor:
■ For use only on computer models equipped with a graphics subsystem with discrete memory 538392-001
■ For use only on computer models equipped with a graphics subsystem with UMA memory 538391-001
For use only on computer models equipped with an Intel processor:
■ For use only on computer models equipped with a graphics subsystem with discrete memory 538408-001
■ GL system board for use only on computer models equipped with a graphics subsystem with
UMA memory
538407-001
■ GM system board for use only on computer models equipped with a graphics subsystem with
UMA memory
538409-001