xbox 360 fimeware flashed come up blue screen

can anyone tell me a fix i have an xbox360 firmware flashed and was able to play all back up games. I downloaded and burnt a backward compatibility disk and updated the 360 then when i put in any disk 360 or xbox it goes to blue screen when the controler is found.
when i first start 360 screen goes black like it is ready to boot, it finds the controller then goes blue not even the dashboard
any replys would be great.