I can't hear sound from an audio accessory with a cable.
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      Check the cable.Make sure the accessory cable is fully inserted into the sound processor and the audio source.
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      Check the audio source.Check that the audio accessory is turned on and working properly and try adjusting the volume.
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      Do you use a remote assistant?Use the sound meter to check the sound processor is receiving sound from the accessory. You can also check and adjust the microphone mixing ratio.
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      Do you have a back-up sound processor?If available, try using the accessory with your other sound processor.