I just tried installing YDL on my ps3, but the screen went blank. Now each time i turn it on, it stays blank, and nothing happens. please help me... how do i fix this?

I think if you hold down the power button for 30 secs or something like that it boots back into the PS3 OS, do a search on google to confirm.

Turn off the PS3 wait for the red light to come on then put your finger back on the power button and hold it there it should come on then turn back off if you did it right you can turn it back on then you should be at the PS3 dash