Hi, I have an Aria Pro 2 frteless which is active, and it hasn't worked on the passive setting for a long time. It started loosing power a few nights ago, and today if I turn up almost full I can hear it faintly through the amp. I changed the battery and opened the circuitry panel but I cant see any loose wiring. I cleaned out the input barrel with WD40, still no good. I thought it might be the amp so I tried another bass through it and it works fine. By any chance can an active pickup suddenly die from old age? (20 years) Any thoughts would be greatly appreciated.