So I was playing my strat today and it was fine, but I opened up my pickguard to tighten a screw that I had meant to tighten for some time. I had just now gotten around to it. But after I put it back on, there was nothing amplified, tried different cables, and my friend's guitar worked, but not mine! I tried to resolder everything that was on the volume pot originally back onto it, but no progress. The tuner doesn't pick up any signals. Any ideas?