My friend's 8 year Xbox 360 crapped out recently and it was a disk tray issue. So because of many other reasons i don't want to mention because it will start "CONSOLE WARZ" I bought a PS3. Very happy with it!
That's happened on numerous occasions to me.I don't know how I solved it, but it's a software problem, not hardware. Just reboot it many times and unplug it every 2 boots for a while. Eventually it should work again. :o
Go to system settings in your dashboard, then select memory, select the drive in question and if you can clear the cache, it will tell you to press Y. Scroll down the list to "clear system cache" press A and confirm option and voila!
bad laser lens
The problem with my xbox might just be a bad laser lens or I just need to clean it because it gets a lot of disc read errors even after I start to play a game.