Dell EMC Latitude 5420, Service Manual

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Steps
1. Align the screw holes on the assembly inner frame with the screw holes on the system board and the palm-rest assembly.
NOTE: Ensure that the tab on the top-left corner of the assembly inner frame is installed underneath the tab on the
palm-rest assembly.
2. Replace the seven screws (M2x3) that secure the assembly inner frame to the system board and the palm-rest assembly.
3. Replace the three screws (M2x5) that secure the assembly inner frame to the system board and the palm-rest assembly.
4. Connect the LED-board cable to the connector on the system board.
5. Route the speaker cable firmly through the routing guide on the assembly inner frame and connect the speaker cable to the
connector on the system board.
6. Route the antennas cable through the routing guides on the assembly inner frame.
Next steps
1. Install the WWAN card .
2. Install the WLAN card .
3. Install the battery .
4. Install the base cover .
5. Install the microSD card .
6. Install the SIM card .
7. Follow the procedure in After working inside your computer .
LED board
Removing the LED board
Prerequisites
1. Follow the procedure in Before working inside your computer .
2. Enter service mode .
3. Remove the SIM card .
4. Remove the microSD card .
5. Remove the base cover .
6. Remove the battery .
About this task
The following image indicates the location of the LED board and provides a visual representation of the removal procedure.
Removing and installing components 41