I have a strange problem with one humbucker on my Epiphone Dot. Everything work except that the D strings is a lot quieter than the other strings, only on the neck pickup, the bridge pickup sounds fine. I've checked the wiring, the poles alignment and adjust the pole screws but nothing change... Does anyone has encountered a similar problem, I don't know what could be the issue at this point. I find it strange that only one string is affected. BTW those are Gibson humbuckers. Thanks for your help!