I have a strange problem with my Harley Benton, cheap guitar from thomann.de. It has 3 single coil pickups. There's no string sound comming out of it, only feedback and humming(that intensifies when you approach your fingers to the strings). I've tried another amp, and it's the same thing.. Could the pickups (all 3 of them) be the problem?

Thank you for your time.

Best regards
Pedro Gregório, Azores.
No, it's not the pickups. Sounds like a ground issue. Have someone re-flow the ground connections and check the wiring for continuity.
Ok so the problem was the... cable... It was completely oxidated. Pristine condition on the outside, rusted on the inside..
Thank you for you time Roo!