There's a pole testing tool that is available at most hardware stores and building centers.
It has two parallel blades and a U ground plug! Neon lamps indicate if the correct conditions are present on the outlet!
They are not expensive. In fact, the one that I have was given to me as a promotion item at Home Depot!
I would suggest that one of these testers be used ASAP, as the situation is potentially dangerous!
I just wish I knew why I still have to use a video cable between my satelite receiver and DVD player when I have HDMI cables connected to both.
(I used the term "video cable" loosely to refer to any cable that carries video information; including HDMI cables. Assuming everything works without one, you don't need a yellow ended old style cable. There is a slight possibility that analog channels, if any, will have a better picture when a yellow plug cable is run from the satellite receiver to the TV and that video input is selected with your TV remote.)