QUOTE(whufc1966 @ Apr 16 2008, 07:11 PM)

Nah hasnt worked unfortunately
Did you acutally see your Xbox restart as per the guide I linked to you? If this is the case, your console should have reverted to 640 x 480. As already suggested, you can always connect it to another monitor and see if you can change it on there.
QUOTE(whufc1966 @ Apr 17 2008, 07:23 PM)

no it didnt restart, tried it several times, held the buttons down for an eternity!
it will be on its way back to microsoft soon
Do you get audio?
I've tried the steps outlined by MS and this is what I did:
1. Switch on your 360 via the guide button on your wireless controller. It has to be player 1 (top-left).
2. As soon as the top left quadrant lights up on your controller, press and hold Y and Right Trigger (not right bumper!). After 10 seconds, the console should switch itself off and turn itself on again. Your display settings should be reset.
Let me know if this works.
QUOTE
The vga (blue,green and red) slots in the back of the tv in the "component" slot, and the audio goes into my samsung home cinema. The 360 then plays its games through the component channel on the screen
I know it's a moot point, but looking back this is what confused me. The Blue, Red and Green phono sockets are Component not VGA - the VGA is the D-Sub socket on the back of your TV.
Do you get an image by switching the cable from HDTV to TV? It's on the Xbox AV plug.
By what you're saying, it sounds like the console itself has the problem. No doubt MS will talk you through 10 pages of troubleshooting....
On to more serious matters, lets hope we can get all 3 points against Derby tomorrow! I'll be sick if the Yids finish above us (IMG:style_emoticons/default/smile.gif)