I have encountered a problem with my Xbox 360. I'm not sure as to what the problem is but it just suddenly happened. Here is my story...

One day the Xbox 360 was working fine and I was able to play games like every other day, so I shut down the console using the controller.

A couple of days later when I turned on the Xbox 360 the console started running but the there was no graphics displayed on the TV. I tried changing the Component AV cable to a new one and still the problem persisted, I even tried it on a friends TV and still the same result.

I am not sure what the problem and I hope that I can get a solution to this problem of mine!

you tried changing the component cable selector there from HDTV to TV?

yeah i did, it still the same

Try this:
http://support.microsoft.com/kb/911059

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.

i try wat u told me already, after i reset it there a xbox360 logo appear, then when i switch off the console again, the problem came back again. there is no xbox360 logo. i try reset it again, but didnt work.

do u have sound?
did the console freeze?
mine had the same symptom... end out 3 rod
pray hard this is not the case

mine the same thing, no video only audio. The solder balls under the gpu are loosening... xclamp erplacemen should do the trick if its out of warranty

but mine got no video and audio, the other day i see 3rod, but then i switch the console of, then no more 3rod, but still no video and audio.