Installing The Power Button With Fingerprint Reader Assembly; System Board; Removing The System Board - Dell Latitude 9420 Service Manual

Installing the power button with fingerprint reader assembly

Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicate the location of the power button and provide a visual representation of the installation procedure.
Steps
1. Align and place power button with fingerprint reader assembly on the system. Adhere the power button with fingerprint
reader assembly on the palm-rest assembly.
2. Place the power button with fingerprint reader bracket on the power button with fingerprint reader assembly.
3. Replace the three (M1.6x2.5) screws that secures the power button with fingerprint reader bracket to the palm-rest
assembly.
4. Gently connect the power button with fingerprint reader FPC cable to the connector on the USH daughter board.
Next steps
1. Install the I/O daughter
2. Install the display assembly.
3. Install the heat sink.
4. Install the base cover.
5. Install the SIM card tray.
6. Install the SD card.
7. Exit service mode.
8. Follow the procedure in

System board

Removing the system board

Prerequisites
1. Follow the procedure in
46 Removing and installing components
board.
After working on your computer.
before working inside your computer.