A few months ago I bought a used GK MB150E-III/112 combo amp from a local pawn shop for about $300. I worked fine for the first week or so, but soon after the sound started cutting out. It doesn't happen every time I turn it on and I've been able to make it through my last two gigs without a major cut outs. When it does cut out, it's usually for a few seconds and then comes back, but sometimes it'll just keep going in and out for a long while. I haven't yet taken it apart since it's a lot of working taking these apart. I thought I'd check here first to see if anybody has any ideas. I'm a college student so I can't afford to have it checked up. I can post a recording of the amp cutting in and out if it'll help at all.