I play on a Carvin 5 string bass with active pickups.
The other day while I was playing, my sound became suddenly very quiet and heavily distorted, until it eventually faded completely. I initially think "Okay, battery died, no big deal". I get some absolutely fresh 9V batteries and pop one in and still no sound.
So now my stomach is dropping, I decided to rule out some other obvious issues. I switch from my bass headphone amplifier to an actual cable and amp, still nothing. The last thing I did was remove the back panel and the output jack panel to look for obviously loose or detached cables, but there's nothing wrong that I can see. The output jack feels solid and is not loose.
My best guess would be that there is a problem getting power from the battery to the rest of the instrument. I feel like if it were a problem with pickups that one of them would probably still be functioning.
Potentially relevant information: I've played this bass for several years now, but acquired it used and the original owner had allowed the battery to corrode at one point. It has since been cleaned up at the shop, but perhaps that could cause lasting ramifications.
Obviously I could just take it in to the luthier, but what's the fun in that? I'm wondering if anyone has encountered this before or knows what's wrong. Maybe this is an obvious issue that I am just not familiar with. Any pointers?