Sharp TV HDMI picture loss

[OneEyedWoodElf]

Does anyone know a reason for losing the picture on both HDMI channels? I know it's not the cable or my xbox, as I am able to use it on another TV. I was playing a game when the screen went blank. I am able to hear sound, just no picture there. Any ideas?? Thanks

[Gromit]

Can you play another device through it. DVD for example.

[OneEyedWoodElf]

I don't have any other HDMI devices to try.

[Vagrant]

Can you get any kind of picture, e.g. from an antenna input, a setup menu ?

[OneEyedWoodElf]

I get completely normal output from every other channel, and I can view the setup menu's on either HDMI channel, as I've been through all the options to try and regain a picture. Just blank once I turn the xbox on, even though I can hear it start up. I've got a feeling that the menu I get is more of an overlay to the screen, rather than a part of the channel itself.