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Power button board
Description Spare part number
Power button board (includes cable) 685408-001
Before removing the power button board, follow these steps:
1. Turn off 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 the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4.
Remove the battery (see
Battery on page 50), and then remove the following components:
a. Service cover (see
Service cover on page 52)
b. Bluetooth module (see
Bluetooth module on page 54)
c. Speaker assembly (see
Speaker assembly on page 56)
d. Optical drive (see
Optical drive on page 57)
e. Hard drive (see
Hard drive on page 58)
f. Fan (see
Fan on page 60)
g. WWAN module (see
WWAN module on page 61)
h. Modem module (see
Modem module on page 68)
i.
Keyboard (see
Keyboard on page 69)
j. Base enclosure (see
Base enclosure on page 74)
k. System board (see
System board on page 79)
l. Top cover (see
Top cover on page 87)
Remove the power button board:
1. Position the top cover with the top edge toward you.
2. Release the tape (1) the secures the power button board cable to the top cover.
3. Remove the Phillips PM2.0×3.6 screw (2) that secures the power button board to the top cover.
4. Lift the left side of the power button board (3) until it rests at an angle.
Component replacement procedures
91