Originally Posted by
Leo_Ames
I imagine this was the first thought that crossed your mind, but just in case it wasn't, the first thing to do is double check your wiring.
If that's correct, I guess it's weakening the signal just enough where your new television is deciding to not display the signal. If you keep a VCR with your setup, try routing things through there so it can boost the signal strength and see if that does any good.
Are you running the same resolution through it as with your previous setup? Some switchboxes like the unpowered 4 port Pelican/GameStop switchbox work just fine with no noticeable issues for most people with standard definition, but start routing something like a 720p signal through a cheap switchbox won't always yield optimum results.