Dell OptiPlex 5490 All-In-One - Antenna Modules; Removing the Antenna Modules

Steps
1. Align the screw hole on the audio board with the screw hole on the display-assembly base.
2. Replace the screw (M3x5) to secure the audio board to the display-assembly base.
3. Connect the audio-board cable to the system board.
Next steps
1. Install the side-I/O board.
2. Install the speakers.
3. Install the rear-I/O bracket.
4. Install the bottom cover.
5. Install the wireless card.
6. Install the system-board shield.
7. Install the back cover.
8. Install the cable cover (optional).
9. Install the stand.
10. Follow the procedure in After working inside your computer.
Antenna modules
Removing the antenna modules
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the stand.
3. Remove the cable cover (optional).
4. Remove the back cover.
5. Remove the system-board shield.
6. Remove the wireless card.
7. Remove the bottom cover.
8. Remove the rear-I/O bracket.
9. Remove the speakers.
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Removing and installing components