So I think my one pick-up is dead. Is there a way to test and/or fix it or do I have to replace the pick-up completely?
Why can't you ask a mechanic?
Obvious question: you checked the battery?
I say maybe one of the pots or whatever could be dead/dirty connection or whatnot. Basically take it to a guitar/bass tech place and have them check stuff for you. If the pickup is dead, they should be able to tell.
It's one of my Bartelonni MK-2's
Check the battery and if it's not that then do what Grungie said
I hope it's the battery...