I have a Blackstar HT-40 and yesterday I was recording myself improving with a video camera. As I rewound the camera it seemed to interfere with my amp for about a second. Today I turned my amp now and this absurd buzzing sound is coming from my amp. I can not play my guitar with this sound either as the noise seems to cancel my guitar playing and no sound from me strumming comes through. If I angle my guitar a little and get it just right, I can play it for a little and get the buzzing to stop but I budge a little too far the buzzing returns.