I'm trying to fix this Dell. It has a NVidia GeForce FX5200 Video Card. Sometimes, during use, the monitor loses the video signal for a few seconds. It comes back after a few moments, but sometimes it just freezes (requiring the computer to be powered off). It has become more frequent lately.
The problem seems to happen when a lot of the video power is needed. For example, when I use Google Earth, the 3D rendering seems to trigger the problem.
I tried different monitors and the problem persists.