text: i think the output jack on my stratocaster is messed up.  how do i inspect/fix it? i get a loud buzzing noise when i plug my fender stratocaster into my fender practice amp.  i think it has something to do with the jack.  how should i go about inspecting the jack and possibly fixing it? first off try another lead. if not this tighten the nut on the jack on guitar. if not this a wire (earth) is broken inside the guitar. if its this take it to a workshop because if you hold a soldering iron on the wires too long the heat will travel up the wire and burn out the coils in the pickup