My Marshall AVT50 Combo crapped out on me a few days ago. The power goes on but there's no sound. I know absolutely nothing about amps, but I do know this one isn't that great. Since it needs to get fixed anyway, can I mod it somehow so it doesn't sound like ass anymore? From what I've read, the Marshall AVT 50 isn't gig-worthy, and I'd like to make it gig-worthy. I don't have $1000 to spend on a new amp so I'd like to do all I can with this one.