Power Button With Fingerprint Reader; Removing The Power-Button Board - Dell Inspiron 5400 2n1 Service Manual

Steps
1. Slide the I/O board into the slots on the palm-rest and keyboard assembly.
2. Align the screw hole on the I/O board with the screw hole on the palm-rest and keyboard assembly.
3. Replace the screw (M2x3) that secures the I/O board to the palm-rest and keyboard assembly.
4. Connect the I/O-board cable to the connector on the I/O board and close the latch to secure the cable.
5. Adhere the tape that secures the I/O-board cable to the I/O board.
6. Connect the fingerprint reader-cable to the connector on the I/O board and close the latch to secure the cable.
7. Connect the coin-cell battery cable to the I/O board.
8. Close the left display hinge.
9. Replace the two screws (M2.5x5) that secure the left-display hinge to the palm-rest and keyboard assembly.
Next steps
1. Install the base cover.
2. Follow the procedure in

Power button with fingerprint reader

Removing the power-button board

Prerequisites
1. Follow the procedure in
2. Remove the base cover.
3. Remove the heat sink.
4. Remove the fan.
38 Removing and installing components
After working inside your computer.
Before working inside your computer.