first off you need ot learn how to take a screen capture so we ca nsee what's going on. Turn the flash off, turn room lights off, set camera to maximum shutter speed or "TV Mode" to eliminate the beam sweep bar.
Did you try the Xbox instructions for troubleshooting "colors off"? it say's many automatic contarst adjustment modes in the TV can cause problems.
so, Turn off the AI -artifical intelligence =Automatic Optimization of contrast levels according to TV signal
Also, noise detection off,
What's DRV-MF, the manual mentions it but doesn't really tell you what it does
if the TV is native PAL, is the Xbox also a PAL unit or is it NTSC?
Finally, it looks like that TV can accept both component video YPbPr as well as RGBHV, with seperate vertical and horizontal synch, thorugh the same ports with an "auto detect" . IT's possible that this circuit is being confused by the signal from the Xbox,
last but not least, print out the owners manual