Topmusicanswers
How do I know if my guitar input jack is bad?
Humming or Buzzing. If, when you insert your cable lead into the input, there is a deep humming tone or loud buzzing sound, it may be an indication that the input ground wire may have come loose. The buzzing or humming is similar to when you touch the end of the lead to a metal object.
How do you fix a crackling input jack on a guitar?
This crackling indicates a disconnected ground wire. To fix this problem, you first need to take off the jack plate or pick guard and locate the detached wire causing the problem. If you're handy with a soldering iron, attach the broken wire back to its original lug, and you're done.
