nVidia GeForce 7600GS Acer X223W Monitor. lost signal

[Mike McMullin]

  On occassion I'm getting a "lost signal" error from the Monitor when I log 
out or attempt to switch users, Hardware Drivers tells me that I'm running 
"version current" of nVidia's driver, and I'm using the digital video out 
port, if that makes a difference.  I've noticed that there seems to be problems 
with other nVidia users getting the lack of signal, or whacked screens.