Ground loop issues....

[ChubbyGibbon]

Have the same problem, will try one of these solutions. Thanks.

[qUE]

Sounds like something else in your place is current dumping and the earth ring is pants. This causes the power to resonate. I'd get an electrician to take a look at the circuit before something goes wrong because of it. Your landlord should have one on call, assuming you rent of course ;)