Dell Inspiron 15 3520, Service Manual

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6. Lift the I/O board off the palm-rest and keyboard assembly.
Installing the Input/Output board
Prerequisites
If you are replacing a component, remove the existing component before performing the installation process.
About this task
The following images indicate the location of the I/O board and provide a visual representation of the installation procedure.
Steps
1. Place the I/O board on the palm-rest and keyboard assembly.
2. Align the screw holes on the I/O board to the screw holes on the palm-rest and keyboard assembly.
3. Replace the three (M2x3.5) screws that secure the I/O board to the palm-rest and keyboard assembly.
4. Connect the fingerprint-reader board cable to the connector on the I/O board and close the latch (if applicable).
5. Connect the I/O board power cable to the connector on the I/O board and close the latch.
6. Close the hinge and replace the two (M2.5x5) screws that secure the display hinge to the palm-rest and keyboard assembly.
Next steps
1. Install the base cover .
2. Install the SD card .
3. Follow the procedure in After working inside your computer .
Removing and installing components 35