My stingray has completely died on me after an intermittent problem of cutting in and out worsened. It began making a low sounding humming with no signal from the pickups coming out at all and the hum increases to a high pitched squeal and popping. I had the faulty preamp replaced and it is still not working but it has actually worsened. I am having all of the electronics and pickup fully reinstalled with new parts and I just have no clue why this happened? Any thoughts?