HP DM4 - Manual (Page 63)

Power button board
Description Spare part number
Power button board (includes cable) 658706-001
Before removing the power button 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 36 ).
5. Remove the following components:
a. Hard drive (see Hard drive on page 43 )
b. Optical drive (see Optical drive on page 45 )
c. Keyboard (see Keyboard on page 47 )
d. Top cover (see Top cover on page 49 )
Reverse this procedure to install the power button board.
Remove the power button board:
1. Turn the top cover upside down with the rear edge toward you.
2. Remove the two Phillips M2.0×3.0 screws (1) that secure the power button board to the top
cover.
Component replacement procedures 55