Out of nowhere, my Epiphone Les Paul started having a sound issue I can’t figure out. When my pickup switch is set to “rhythm” or both (in the middle)…I get sound, but very quiet (have to turn my amp up loud to hear anything)… when I’m switched to “treble” only…I get NO sound at all. The troubleshooting I’ve done so far is to take the backs off the switch and volume knobs and look for any obvious wiring that came undone….also took out the pickups for the same. I can’t find anything that looks obviously broken, but I don’t know what to do next besides take it to a shop. Does anyone have any friendly advice before I take it in? Thanks in advance.