So i was at my Friday gig talking to the drummer and right before the first song my Stingray slips off the strap and hits the floor. Such a squealing i've never heard. After plugging it back in and checking the battery it would only give me a weak signal-like one half the volume of normal. I think it hit the carpeted stage right where the cable plugs in. The keyboard player thinks my jack needs to be fixed-he says i've lost the ground. Do y'all think he is right?