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Question

Denon AVR system

Sep 10, 2016 8:21PM PDT

I have a Denon AVR 500 system.
This is connected to a TV.
The picture and sound suddenly go off .
The amplifier is working independantly and the TV is also working alright.
Is this a problem of optic fibre cable . How do you clean the optic fibre cable. We can see a light at the terminal of the cable.
Please advice

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