Video Issue with 7NJS Ultra Zenith

My video is turning off for no reason. It just leave and my monitor
states that it is looking for a signal, but everything appears to up
and running. I bought a new video card and put it in and loaded up the
drivers and still the same issue.

The Cbox 2 will flip between 1F and 3F or vise versa the whole time
this is going on.I cnat seem to put my finger on what is going on. I do
not have it oc'ed. I am running an AMD 2300+ w/1 gig of memort. I
installed the the MBM 5 and my temps never get above 125 degress F.


Any help would be appreciated.