I've had my jackson dkmg for about a year now and use it all the time. Yesterday the tone got messed up for no reason. It all of the sudden had a very tinny and weak sound like the volume knob was turned most of the way down. I tried it in multiple amps and had the same problem. So i'm wondering what's broken and what i need to do to fix it.
is it an active pickup? if it is you might just have to change the battery, if its passive it might just be bad wireing. harder to fix but still not all that bad.
Sounds to me that if you do have passive pickups, then you have a faulty wire or the soulder is wearing off.
Check the conection on your input, sounds like a problem I once had.