Recently I purchased a NVS 420 card to send graphics to 3 different monitoring devices. The first is a 15" ELO TouchMonitor, which requires a VGA signal. Second is a Samsung 32" LED TV, which takes HDMI. Finally there is a NEC projector which can take any input I need to give it. The problem arrises when I attach the Elo. I am able to see both the TV and the projector using both the DVI-D adaptor and the Display Port Adaptor, however I can not get the Elo to work properly with either the DVI-D or Display Port Adaptors.
When using the Display Port adaptor I convert the signal from DP to VGA, at which point there is a 33% chance of the monitor coming on. It either it comes on, and shuts off the other 2 monitors and won't release control of them until I unplug it and reboot, or every monitor comes on but as soon as I attempt to "apply" the 3 monitor setting, the screens go blank and a random one of the 3 will come to life and the other two will not, or just the Elo will cease to function and the control panel for the card won't see it anymore.
When using the DVI-D adaptor, an active converter box is added in line to convert from DVI to analog signal. However, I are having the similar issues as the display port setup. I can get everything but the Elo to work, but as soon as I add the VGA, I start to either loose the main monitor, or the main monitor and the 15" will work, but the 3rd monitor is dropped out of the chain. I never loose detection of the monitors, they just loose the video signal and can't recover it. Some times I am able to change resolutions on the VGA screen and that will temporarily fix the issue, but as soon as the computer is rebooted, it's back to square one.
The drivers being used are GeForce 285.38 for Windows 7 64 bit.
I'm completely stumped at this point, and any help would be greatly appreciated.