Sudden loud rumbling static noise from all speakers (receiver)

[csice]

I didn't change anything and now it suddenly sounds like a really static radio station that comes from all 6 speakers from all inputs. I have a Yamaha receiver. I have no idea what to do, any help would be greatly appreciated, in the meantime, I can't do anything involved with the tv.

 

[Ubrales]

Check for loose or semi-loose (?) connectors. I get this sound when I plug-in or un-plug the speakers.