Hey guys, I have a Schecter Omen-5 bass and whenever I turn the any of the knobs it gives me alot of buzz/scratch sound. I looked inside but all seems good, do any of you know what could be causing this and how to repair it? Also from time to time the cable drops signal, wiggling it fixes this though, I have come to realize its the guitars fault on that and not the cables. It has active Diamondbass pickups, the battery is new. Thanks much!