Green Channel out on graphics controller

OS: Windows XP
Monitor: ViewSonic E771-2 (Driver installed is also ViewSonic E771-2.)
Intel Graphics Controller 82810E DC-133

This used computer has color problems. I had it connected to an old monitor, and assumed at first that the problem was with that monitor.

Now I have connected this computer to my keyboard, video, and monitor via a Belkin KVM switch. My old computer uses the same monitor with zero problems (also XP, also with the E771-2 driver, but it's a DELL).

The graphics controller has some great software attached to it. I opened the Graphics Controller Properties and clicked on the "Color" tab. Here, there are slides for "Gamma," "Brightness," and "Contrast." Moreover, you can adjust all three colors together or each one independently. I noticed that when I adjust the Green channel by itself, there is no visible change to the display.

I have not opened the box, yet. Do I need to replace the entire chipset? Is there a separate video card in here? Maybe there is a software solution? Any advice will be appreciated.

I have run across this a couple of times. One cause was a missing pin on the monitor connector/cord. The other was a bad connector on the videocard. Sometimes you can jiggle the connector and see the color change.

If it has the same symptoms with 2 monitors (as long as both monitors aren't going through the KVM switch) then you have a bad motherboard (as Intel graphics are integrated to the mobo).

Thanks. I have opened the box now. There are some empty slots here. What if I just insert a working video card and use that instead of the connection on the mobo?

This issue is resolved.

Edited by elinatim, 31 January 2009 - 06:33 PM.