I think the radio is OK and the CD is quite good :)
Anyway, the volume control is digital on an 816, so this is
very strange. With an analog volume control you would normally
clean it with TV tuner cleaner. But, in this case I think
it will need professional help (or replacement)
You can check if it is digital (in case I am wrong) by twisting
the volume knob really fast. On digital volume controls the
volume will not change when you do this. The volume control
will also just keep going around and around on a digital unit
since there are no stops (so you can twist it 720 degrees, or more).
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