Xbox 360 showing a green screen?

[Ploppy1999]

Hi i've just changed my auto switch box for my tv from a 2 to a 3 port. TV only has 1 HDMI port. Everything worked fine for a few hours then the picture kept dissapering so i put the old 2 port switch box back on now my Xbox 360 has a green screen!! I've swapped cables over, i've unplugged and repluged them back in i don't know what else to try is my XBox nackered or is it the tv, the sky seems to work ok on the old switch box just not the new one. any ideas?

[Mattk]

What is showing on the ring of lights i.e. the normal top left green or something different?

[doomey!]

Make sure your hdmi is on the right reference settings, (in the last blade) being on the wrong setting can cause picture dis-colourisation.

[doomey!]

Also try plugging the xbox directly to the tv with the hdmi, so you can eliminate where the problem lies. I suspect its the switch box however, they are notoriously unreliable.