This is the open forum... and i am a noob

My yamaha pacfica is giving no feedback to either of my amps and ive tryed with serveral wires, i jsut get this beating noise over and over. Is there something wrong that you think i can fix with ease, i.e. something loose?

Ever since i started playing it it would occasionally stop and all you'd have to do is give it a thump lol and it be fine now its stopped all together.
English Please.
Gibson SG Standard
Fender 52 RI Telecaster
'77 Deluxe Reverb
Sunface w/ SunDial
MXR Carbon Copy

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