hi, i have a problem about my pus's hum. i replaced my fedner jazz set to lindy fralin set. but the problem is coming out, when the pan pot in the middle is noiseless, very clear. btw when i pan to neck either bridge, the hum is coming out, just like a boiling water sound!! i try to ground the pus, but no change. pls help me. it's really annoying me. thanks.