Quick help!!!!!!!!!!!! on my ps3 blu ray movies!!!!!?

so i have the original 60gb (250gb) and i havent played a blu ray movie in a while, and i tried just few moments ago and im not able to play them i tried 2 movies(blu ray) it'll do that lil clock thing on the top right corner and then my screen will go blue and say no signal but if i eject the movie it'll come to the xmb, i have the latest update and my regular dvds work cuz i just watched a movie 2 days ago and i have the new cod MW2 game and been playin that fine since i got it wednesday. has this happenned to anyone?? or anyone kno how to fix this??? all my BD parent controls are the same as b4 and stuff, i did check the settings so please help thanks!!!!