My monitors lost their brightness without warning or reason. I left my computer alone for a couple hours, and when I came back my monitors were so dark I could barely see anything.
It looks as if the brightness setting on my monitors was turned all the way down, except that the brightness is cranked up as far as it can go - the way I always have it. Furthermore, my monitors are both having the same problem simultaneously, which makes it seem like it's not a problem with the monitors themselves.
My computer consists of the following:
Motherboard: BioStar M7NCG 400
CPU: AMD Athlon XP 2200+ 1.8GHz
HDD: Three drives - 40GB, 120GB, and 160GB
Optical: Single DVDRW
Removable: 1.44MB Floppy
Video Card: NVidia GeForce 4 TI 4200, DirectX 8 Compatible
Monitors: Two Gateway VX900 19" CRTs accepting VGA output
One of my monitors is plugged directly into the VGA port on my video card. The other one is plugged into the DVI port on my video card, with a DVI-VGA adapter in-between. I should also mention that my video card may be eight years old, but it was made with one of the largest and most reliable video processing chips available at the time. It still runs many current video games without problems, and I would have to spend several hundred dollars to replace it with something comparable. This is why I'm trying to keep it alive as long as possible. I bought it new in '00 or '01, and I've never had the slightest problem with it. I've taken excellent care of it, keeping it cool and dust-free. So it's difficult for me to point at a hardware malfunction as the culprit.
I can see basic aplications alright, as long as they have a lot of bright colors in them. But this is still the most frustrating thing I have ever seen. It's driving me nuts.
Does anyone know what could possibly cause this type of occurrence?
My only theory is that maybe the drivers have caused an error and kicked down the gamma or something. Can anyone verify or deny that this is possible? And where in the NVidia application(s) could I find the gamma settings? I have tried restarting my computer to no avail.