Hello Talkbass hive mind. I have a Fender Jazz MIM fretless bass, with passive OEM pickups that was my favourite bass right after I bought it. Years passed, Things changed, I started playing upright, and other bass guitars, then it seems that many more years passed before I played this bass again. When I did, I was shocked at how low the sound was, and how one pickup was dead. I used my new favourite bass guitar for the gig and told myself that I was going to fix the fretless. I work on cruise ships and go months without playing the instruments left at home. Another year later, and I'm now wanting to fix this bass. I just tested it and it is completely dead now. No sound. Testing Amp and cable work fine. I figure it could be corrosion. Years of no-use. I take the pick guard off, see no unattached wires, no broken solder. Output jack looks ok. I use contact cleaner and remove gunk from the pickup contacts, spray inside the pots, jiggle cables, clean things. Still nothing. Perhaps a cable is broken inside its insulation? Any ideas of what might be wrong? Do passive pickups on basses like this just die?