Loud buzzing

My 360 has started to make a loud buzzing sound whenever it's on lately. I don't know what the problem is, and tried sending a message to the xbox support staff.

Has anyone else had a similar problem to this. If so, is there a way to fix it?

is there something on it? if so then the fans' vibration is making that item vibrate. if not, theres a fix but its not worth fixing