Hey, new to forum and have just started to learn to play. I bought a Gibson Epiphone lefty bass from a pawn shop. It was missing springs and some screws for pick-ups so I paid a bit extra and had it "set-up" so that I would be starting fresh. Guitar plays well (I think) but the bottom half of the neck pick-up makes noise if i touch it while playing the bottom strings. It seems to amplify the notes fine - but if I tap the plastic housing with my finger it makes a feedback sound like when you tap a microphone to see if it is on. That Pick-up can be pushed down some and rebounds on release. Other half of neck pick up and the other pickup do not. I was reading that this may e the problem. Is it just loose or do I have a short or something in this? I am sure this is an easy question - just so new to the guitar that I am starting from zero. Thanks!