Dell OptiPlex 390 (Mid 2011) - Manual (Page 27)

Speaker
9
Removing The Speaker
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove the cover .
3. Disconnect the speaker cable from the system board.
4. Unthread the speaker cable from the chassis clip.
5. Press down the speaker-securing tab and slide the speaker upwards to
remove it.
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