I was in my new Cox 5E3 for the first time just to loosen up the holding nuts so that I could jig the chassis a little bit straighter. It was crooked maybe from shipping. It had been working 100% (and sounded great too), but something about using a very small socket wrench to loosen the nut on the right side, I must have bumped the normal 1 plug. I thought I was being pretty light handed, and nothing LOOKS buggered - everything looks as it should be. But when I plug into Normal 1 it's just a big bassey loud hum with very little or no guitar signal coming through. I can get it to stop and play good but pushing the input cable jack this way and that, so it must be a bad connection somewhere. The cable is a few days old and is fine in all other inputs. Volume control is still responsive with the loud hum. Did I short an input to ground somehow? ... Well, I feel stupid enough having trying to fix a cosmetic problem and creating a big audio problem. If anyone has some good advice of things to check I'd appreciate it. I have a couple of biggish gigs coming up soon and I can't fully tear into the amp and risk not having it useable. Thanks guys. This is the best forum ever, and one of these days I'm going to start returning favors.