I have a Fender Deluxe J-bass that I've had for about 5 years. I used to play it every weekend at church and never really had any issues with it. One day my leaders had offered pay for getting my bass serviced and getting a routine maintenance at Guitar Center. So I gladly said yes and off it went for about a week. I finally got it back and it was not the same. One of the knobs no longer had that mid position little dent feel thing (not sure how to say it lol) and I would get an occasional pop from the output jack when moving around. Being a passive person at the time and the lack of knowledge on bass (and still do lol), I just let it slide without saying a word, when I should have returned it to get it repaired again. Unfortunately, that was years ago and it's too late to go back. Now, the popping noise has gotten pretty bad, to the point where I can't even move without it making noise. I replaced my cable twice just to make sure that wasn't the issue. So I thought maybe the jack just needed a little cleaning. As I was removing the screws holding the jack plate, I notice again that one of the screws did not match the other and looked kind of worn out. As I am pulling the jack out I notice this I don't know much about bass electronics, and tell me if I'm wrong, but I don't think there should be tape holding the wiring together. Is this the root cause of the popping that I am getting?