IF the volume is turned up and the unit is not is its "Auto Quiet" mode and no audio is reported during the units self test, then contact the manufacturer of your radar detector. They can then tell you what steps are needed to get the audio back on your unit.
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IF the volume is turned up and the unit is not is its "Auto Quiet" mode and no audio is reported during the units self test, then contact the manufacturer of your radar detector. They can then tell you what steps are needed to get the audio back on your unit.