I have a fully functional JTV-89 (so I know how the JTV-89 should work), and just bought another, which is not working properly. Curiously, the headstock is reversed on the latter guitar (but the latter guitar has a trem, while the former has a hardtail).
If I pull the battery, the guitar works fine off of the mag pickups.
If I put the battery in, I get almost no sound out at all, on any of the 5 switch positions. Note that I've not activated the electronics by pushing down on the model control: I just insert the battery and insert the guitar cable. If I move the 5-way switch around, sometimes on two of the positions, sound comes through for about 1/2 second; but not always. If I try to activate the electronics, by pushing down on the model switch, again, sometimes I get about 1/2 second of sound going through. On a simpler guitar, I would imagine an intermittent connection somewhere.
I attached the cables for Workbench HD, and the computer cannot see the guitar at all (no connection).
This does not sound like a simple fix, although I am open to troubleshooting suggestions.
What kind of repair/service options exist?
Thanks!
Jon