Dell OptiPlex 9020 (Mid 2013) - Manual (Page 16)

Removing the Speaker
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove:
a) cover
b) front bezel
c) drive cage
3. Disconnect the speaker cable from the system board.
4. Release the speaker cable from beneath the system fan cable and WLAN antenna cable (if installed).
5. Release the latch and rotate the speaker to unlock position.
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