Hey guys, my Sterling by Musicman SB14's input jack is giving me problems. When I plug it in, I get no sound, and I have to shake the cable to get it to work, and when it finally does, it cuts in and out and distorts... No this is not a cable problem, I tested the cable out with my other two basses and it works perfectly... I opened the bass up and saw no loose wires or connections, so I looked at the input jack and saw what looks like a burnt mark on the jack. Could this be the culprit?