I recently changed the strings on my bass and when I went to tune it, there seem to have no signal from the bass to the tuner and then my amp. I thought at first it might had been my cable so I used another. When I tried that, still nothing, I was a bit worried and I thought I'd check my battery in for my electronics and replace it in case there was no life from it anymore. I changed the battery and my bass still did not work. Now I'm sitting here on the verge of crying because I have no idea what could be wrong and I was hoping someone had some advice before I decide to send it to a repair shop. Thanks.