you most likely need to just replace the the volume pot..you can get parts from your local music shop...but i think you should just take it in and get a tech to do it all for you...i shouldn't cost to much.
Ok I am a novice so I dont know how to solder or clean the pots.ryanb said:... or clean the pots ... or a bad ground or cold solder joint. You should be able to fix that without changing all of the electronics. Have a tech check it out.