Dell Inspiron 5391 Service Manual page 24

Steps
1. Connect the fan cable to the system board.
2. Align the screw holes on the fan with the screw holes on the palm-rest and keyboard assembly.
3. Replace the two (M2x3) screws that secure the fan to the palm-rest and keyboard assembly.
4. Connect the I/O-board cable to the system board and I/O board.
NOTE: This step is only applicable for computers shipped with a WWAN configuration.
Next steps
1. Install the battery.
2. Install the base cover.
3. Follow the procedure in After working inside your computer.
24 Removing and installing components