This just started never had problem before.can you help? the sound is great neaver bumped or droped,just started all at once.
These types of failures are often component level failures. You could start with quick and easy stuff....but you'll need to open it up.
Once its open, start at the speakers and work your way back. First, check speaker connections (board side and speaker side) Then test the speaker https://www.youtube.com/watch?v=XpdKpnz8h64
If this is all good, then we are on to component level testing and inspection. Inspect the board for the obvious signs of failure. If this is good, go on to testing the output stage on the affected side. Use the good side as a reference. Work your way towards the front end (input stages) eliminating possibilities as you go.
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