I have just started having problems with monitor turning off at random
times.

I have a brand new GForc 6600 AGP 256 MB video card.  I have put the
card in another computer and it doesn't turn off like it did in mine.
I even move the monitor to the other computer and it stays on.  

I have had the video card for a month now but just started using XP SP2
and all this started happening.  I have checked the power options and I
have standby and montior off to never.  Can't figure this one out.  

The only thing that turns off is monitor, or should I say the view, I
stil get the yellow/green blinking light like it waiting for something.
I can reboot and it all comes back on but only to go off again, this is
never at the same time.

My system
windows xp sp2
cpu 3.09 Ptm 4
1.5 GB Memory
450 watt power

Thanks for any help