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Removal and replacement procedures 4–44
System 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 4-8).
5. Remove the following components:
a. Optical drive (see “Optical drive” on page 4-9)
b. Hard drive (see “Hard drive” on page 4-11)
c. TV tuner module (see “TV tuner module” on page 4-13)
d. Memory module (see “Memory module” on page 4-15)
e. WLAN module (see “WLAN module” on page 4-16)
f. Switch cover (see “Switch cover” on page 4-18)
g. Keyboard cover (see “Keyboard cover” on page 4-20)
h. Keyboard (see “Keyboard” on page 4-24)
i. Speaker assembly (see “Speaker assembly” on page 4-30)
j. Display assembly (see “Display assembly” on page 4-31)
k. Top cover (see “Top cover” on page 4-38)
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 4-14)
■ Fan/heat sink assembly (see “Fan/heat sink assembly” on page 4-54)
■ Processor (see “Processor” on page 4-56)
Description Spare part number
Includes 1024-MB of graphics subsystem memory 506495-001
Includes 512-MB of graphics subsystem memory 506494-001