When the amp gets warm the volume cuts in and out. Even the light dims and flashes. Recently I played it for a while and now the tone controls don't work. I bought a DC30 a few year ago, and like an idiot I didn't address the problem right away. I have other amps, so it wasn't too urgent.

It looks like there may have been others with a similar problem, was there a problem with the circuit at some point?

thanks in advance

Tom