I need to know if anyone has any knowledge of Coax connections in the backs of TV's? Mine is very loose. The picture shrinks from the top edge and it gets a little snowy. We only have an antena on it so I thought it was that. I hooked up my VCR to it and it did the same thing. This is just a crappy 19" tv that is a spare so I would like to try to open it up and fix the connection. Any suggestions?