QUOTE
Thank you for writing to Xbox regarding MS VGA adaptor.
I do apologize for the inconvenience.
To reset the display settings of the Xbox 360 console to the default settings, follow these steps:
1. Remove any discs from the disc tray.
2. Turn the console off.
3. Turn the console on.
Note If you are using an Xbox 360 Wireless Controller, turn the console on by using the Xbox Guide button on the controller. Make sure that you use the player 1 controller when you do this. The player 1 controller will have the upper-left quadrant light illuminated.
4. As the console starts, press and hold the Y button, and then pull the right trigger at the same time.
5. The Xbox Dashboard resets the display settings to the default settings, and then automatically restarts the console
In case you have other Xbox concerns, feel free to write back. We take feedback on Xbox and our Customer Service very seriously and review customer comments daily.
Sincerely,
XXXXXXXX
Xbox360 customer Care Team
Tried it as well, and all it did was reset the the resolution i was currently using to 640x480. The colors, constrast, and black levels did not change.