what you should of did since I told you I posted is to search what I have posted with the search btn and then you would of found this:
http://www.teamxecuter.com/index.php?name=Forums&file=viewtopic&t=26689&highlight=
"H E L P ! ! ! ! ! Flashed bios and messed up my screen"
First go into the x3bios which is hold down white durring boot and just hold it for a lil while since you can't see the screen. If you flashed something other than x3bios on you chip than you will need to get the x3bios back on or this will not work thru the button method. Once in x3bios press:
Down 4x
A
Down
A
Then you will will get this menu:
PAL 1 <= For this one press A
NTSC U <= For this one press Down and then A
NTSC J <= For this one press Down, Down, and then A
Pick which ever one is yours, this will fix the Region.
Also which video did you change? REGION or Size(WideScreen)