My friend on facebook suggested i unplug it, take the battery out wait a few minutes and then put the battery back in. I did just that, and it came back on. YAY!
I have a HPpavillion Dv221ous Entertainment notebook with vista home premium.
I was using it in the living room with battery and plugged in.
It was working fine. I unplugged it from the wall and carried it into the bedroom while it was still on, placed it on the table and walked into the other room. when I came back the display was white with designs/snowy picture. (no desktop)
I turned the power button off hoping it would start up normal again.It did not. The power light comes on when you plug it in, the sound of the motor is heard. just no picture. Black/blank screen.
I would guess sleep mode but there would not be that white fuzzy screen appearance.(which i no longer get)