Compaq Presario CQ57-300 Maintenance and Service Guide - Page 61

Power button board, Turn the top cover upside down, with the top toward you.

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Power button board Description Power button board (includes cable) Spare part number 646129-001 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), and then remove the following components: ● Optical drive (see Optical drive (select models only) on page 37) ● Keyboard (see Keyboard on page 46) ● Top cover (see Top cover on page 49) Remove the power button board: 1. Turn the top cover upside down, with the top toward you. 2. Remove the two Phillips PM2.0×3.0 screws (1) that secure the power button board to the top cover. 3. Remove the power button board and cable (2). Reverse this procedure to install the power button board and cable. Component replacement procedures 53

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Power button board
Description
Spare part number
Power button board (includes cable)
646129-001
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
), and then remove the following components:
●
Optical drive (see
Optical drive (select models only)
on page
37
)
●
Keyboard (see
Keyboard
on page
46
)
●
Top cover (see
Top cover
on page
49
)
Remove the power button board:
1.
Turn the top cover upside down, with the top toward you.
2.
Remove the two Phillips PM2.0×3.0 screws
(1)
that secure the power button board to the
top cover.
3.
Remove the power button board and cable
(2)
.
Reverse this procedure to install the power button board and cable.
Component replacement procedures
53