Power button board
Description Spare part number
Power button board (includes cable) 720553-001
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 41), and then remove the following components:
a. Service door (see
Service door on page 42)
b. mSATA SSD (see
mSATA SSD on page 43)
c. Hard drive (see
Hard drive on page 46)
d. Base enclosure (see
Base enclosure on page 53)
e. System board (see
System board on page 64)
Remove the power button board:
1. Detach the power button board cable (1) from the top cover. (The power button board cable is
attached to the top cover with double-sided tape.)
2. Remove the Phillips PM2.0×2.9 screw (2) that secures the power button board to the top cover.
3. Release the clip (3) that secures the power button board to the top cover.
4. Remove the power button board (4).
Reverse this procedure to install the power button board.
Component replacement procedures 91
