Haven been getting this off and on since I got my xbox near release. It's usually fixed itself, but for the last couple months it has crapped out entirely.
I'm using the Xbox high speed HDMI cable to go from HDMI IN to my, TV. I have also tried 3 other cables, and no go.
I've tried factory resetting, and making sure my STB settings are all correct a few times as well.
The odd thing is if I pull the cable out slightly the picture and audio come back, except it flickers. If the cable is seated properly I can't get a signal. I;ve contacted Microsoft support a few times and I keep getting a runaround. They even managed to screw up a Advanced Exchange Service for me.
I'm at a loss here guys, any suggestions? Everything else works just fine, just not Live TV, which was one of the things I actually bought the One for lol.
I'm actually wondering if the HDMI IN port is bad on my system. It's the only thing I can think of, and Microsoft couldn't even do an exchange correctly.