I have a Vetta II HD (not the combo amp model) that out of nowhere stopped outputting sound from my guitar. I've tried multiple instrument cables, multiple speaker cables, and multiple guitars, so I'm certain the issue is inside the amp. Additionally, when I AM plugged in, every 5 seconds, my cabinet makes a single popping noise, that's the only sound it'll make, and it makes that noise even with no instrument cable plugged in. When the speaker cable it unplugged, I hear a faint noise inside that I can only describe as sound like an SLR camera flash charging up, which I assume is going on at the same time/duration the popping noise to my cabinet is happening.

Now, I do have other issues which includes the Vetta II always starting up on a different amp page/selection than what I previously used (in fact, it starts up on the same one all the time, and it's not channel A on page 1) and also resets my contrast to be at the lowest setting so I can't read anything on the LCD - but I'm sure this is something completely different.

Let me know if you need me to provide any other information, and thanks in advance for any help you can give!