weird nvidia problem

we have a number of identical computers with the ASUS A8N-VM-CSM mobo that has a built in NVidia 6150 GPU. two of these boxes offer the same problem. After a few hours of normal, low duty cycle use, the video shifts to displaying only wide diagonal bars. Sort of like loss of horizontal sync on old tvs.

I've contacted ASUS, but they never heard of the problem. I've tried swapping memory, power supplies, monitors, you name it. I've run the boxes on a test bench with software to stress the system. After 6 hours at 100% CPU, all is still well. I don't even know how to describe the problem for a google search.

In desparate need of suggestions. Have very ticked off users and supervisors.

TIA

 

Hi Bob,
Check at the monitor manufacturer's website if drivers are avilable. If not, check that the monitor is listed as Plug and Play in Device Manager, not Default Monitor.

After that I would consider looking for updated chipset drivers at Asus (under Others in the driver download list) and even uninstalling and reinstalling the graphics drivers.

Matt