Hey Y'all. I was asked to do a jam at a friend's house party. I brought my MM Stingray 4 string, built in 1999. Throughout the first part of the gig I was getting some static sound from the bass. Then nothing. Changed the battery, nothing. Opened up the battery compartment and saw that the black wire has completely separated from the Gotoh battery box. OK. No problem. My buddy has a soldering iron. Added a short length of wire and re-soldered. Should be good to go. Nope. Nothing. Removed the battery, turned up the gain and master all the way. Can just barely hear the bass being amplified. Way lower volume output than if you just remove a battery from a Stingray and try to play (it will work passively, just sounds bad and has low output). Replace the battery and still no sound. If I shake the bass, I get a static sound. If I rotate the treble, mid, and bass knobs, I get static. So....power is getting to the board, and to the output jack, but no sound from the pickups when the signal is routed through the preamp board. Pulled the controls and board out. Looks like all connections are good. Output jack connections look good, including the battery connection part. So... The preamp board does not look too complicated, but it is beyond my ability to test it. Does anyone know what happened here? And: Is this a situation where a local tech might be able to fix it, or does this have to go to Ernie Ball Music Man?