Playstation 2 cd drawer problem

i was playing pro evo 6, and paused it to go get my dinner, when i came bak the game was froze and it wudnt unpause, so i restarted the ps2 and it just loaded up a black screen, the blue light for the cd drive aint coming on, and the tray wont open, but when i turn the ps off by the switch on the bak, then on again,i can press the cd drawer button to turn the ps on, but it still wont open the cd drawer. anyone know how the fix this?