• It is likely to be a connection on the front ... volume, balance, etc. Some switch cleaner (or pure alcohol) applied to these parts might sort it. Obviously don't do this whilst plugged into the mains, and let it dry (evaporate) before using again.

  • Great info, thanks.

    I should have mentioned that only the left channel had a problem to start with, so I switched to mono and only used the right channel but then the right channel inherited the same problem after a while.
    Does that help narrow the problem? :/

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