It happened during practice a few days ago. I was using someone else's cab and the volume dropped. I smelled a burning smell. I tested it with a PA speaker and there wasn't any sound. The reason it dropped out in the middle of practice is because we rented a huge hourly room and I wasn't plugged into the PA so I maxed my head... I know, that's what I get for maxing it out with someone else's can. I burnt that cab btw. Took it home, top cover off, turned it on, no burning smell. Just now tried it with my 410hlf and there is berely any sound coming out of it. -The relay clicks after a few seconds of powering up. -All the knobs and switches seem to respond even though I can berely hear it. -The peak light goes with my playing when maxing the gain out. -Both fans in the power supply are spinning. -All 6 preamp tubes appear to glow normal. -When trying both outputs while holding the bass strings, I felt current go through my fingers so I know it's got power. Any ideas what needs to be replaced in order to fix this? Edit: it pops really loud when I shut it off.