What can be wrong with my xbox 360?

What is wrong with my Xbox 360? What can I do to help it?

• Almost every day of my life I've turned on my XBOX 360 using my computer PC monitor as a screen for gaming and it's worked flawlessly. Last Week I packed up my XBOX 360 to stay at my grandmother's house and used her HD television and changed some of the settings on the console so it would fit the High Quality compatibility. I packed it up and brought it back home, hooked it up, just like it always has been, and now it will not start properly. My computer monitor is acting like the Xbox isn't hooked up to it at all. The Xbox won't turn on all the way; The light in the middle of the start button is bright green but the ring around it isn't turned on. When turning on the xbox by pressing the giant X-Button in the middle of the controller, the "Player Lights" just keep flashing and going around as if the batteries were almost dead. Which they are not, since I changed them only two days ago. Any guesses on how to fix this? I looked up ways to reset my console's resolution settings by pressing Y+Right trigger, but it isn't working. The screen just won't turn on.

• Answer:

  Ur screen cant handle the amount of info sent to it... Hold down the power button on ur xbox for a while until it reboots it should reset the setting on ur xbox n fix it.. Hope tht helps xoxox