Harddisk FULL, PS3 doesn't start.

Hi,
today I've buyed the PlayTV, I have a PS3 with 40Gb of harddisk.
I have setted the PlayTV to record a tv program and
during a Blu-Ray playback a warning message start to blink onhhte tv.
I realized that the hd was full, but probably too late.
Now I can't restart the PS3.
The Red led turn to green, but nothing happen.

H E L P
/r