OK, this could be utter nonsense, but since nothing else is working for you:|
Is it possible that the newer TV has negotiated a 1080p signal with the xbox, then your old TV cannot support this signal (it's a 1366 x 768 panel) and is also not auto-renegotiating with the xbox. So, you could try hooking it up to the LG, manually configuring to 720p and then try it on the Panasonic. You would have thought that resetting video should have done the trick, but it is one more thing to test.
EDIT: heh, Bertie beat me to it.
#7754647, By iter Bizarre 360 HDMI and TV problem.
iter 117 posts
Seen 16 hours ago
Registered 11 years ago