I picked up this newer Made In China Dean Edge 4 with an electronics problem, thinking I was going to fix it in five minutes, but.... (I'm pretty good at trouble shooting passive electronics, but not active). No sound at all. Nothing comes through the cord and amp. The cord is known to be good. It has active electronics, 2 large pickups, 4 pots (3 of them have detents you can feel, the 4th appears to be a regular pot). I checked the battery compartment and those wires are still soldered solidly. The pots were loose and turning when the knobs were turned so I tightened them. All connections look good. Please say its not a fried preamp... The output jack has 3 wires going to it. I haven't tested it, but its probably OK since the bass has not seen much use.