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Dell Latitude 7420 - Audio board

Dell Latitude 7420
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Steps
1. Align and place the display assembly at a 90ยบ angle to the bottom chassis.
2. Replace the four (M2.5x4) screws securing the hinges to the bottom chassis.
3. Route the display cable along the guiding tabs and connect the display, camera, touch screen, sensor board cables to the
system board.
4. Connect the antenna cable to the WLAN module on the system board.
5. Replace the WLAN bracket on the antenna connector of the WLAN module on the system board.
6. Connect the WWAN antenna cables and route the antenna cables along the rubber guides on the system board.
7. Replace the single (M2x2) screw securing the WLAN card bracket to the system board.
8. Align and place the display cable bracket on the connector on the system board.
9. Install the two (M2x2) screws securing the display cable bracket to the system board.
Next steps
1. Install the WWAN card.
2. Install the base cover.
3. Install the microSD card.
4. Follow the procedure in after working inside your computer.
Audio board
Removing the audio board
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Remove the battery.
40
Removing and installing components

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