4. Remove the ngerprint reader board and cable assembly from the top cover (4).
Reverse this procedure to install the ngerprint reader assembly.
Power button board
Description Spare part number
Power button board assembly for 14” computers 821169-001
Power button board assembly for 15” computers 821190-001
Before removing the power button board, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o 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 rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 35).
5. Remove the battery (see Battery on page 40).
6. Remove the following components:
a. Keyboard (see Keyboard on page 50)
b. Hard drive (Hard drive on page 41)
c. Internal base plate (Internal base plate on page 56)
Remove the power button board from a 14” computer:
Component replacement procedures 63
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