There are some models of monitor that have a self test capability, and this will indicate if the monitor is functioning correctly. If the monitor is not working correctly, check the solder connections- often you will have a cold joint reponsible for intermittent operation. There is a small chance it is a capacitor in the red drive circuit. There is greater a possibility that the Red Drive transistor is bad, this will usually be a modest power transistor, something on the order of a TO-220 size. You can also check voltage on the outputs of the transistors for each color gun, they should be about the same for each gun, if there is significant difference in any one, that would be the place to begin.
Have you had an opportunity to try a different monitor on the computer yet? If a diferent monitor also shows the same condition, the card would be suspect, however I am inclined to believe it to be in the monitor.
: I need someone to e-mail me an answer, not place it on this message board. My computer screen is yellow. It started about 6 months ago, it would turn yellow for only a few seconds at a time, reciently the times became longer but always came back. Now it is totally yellow, i am typing to a yellow screen right now. It wont go normal. some have said it is my video card, others suspect its my monitor, the monitor is a packard bell only a couple years old. the sys is revamped but has been working great, until now. scan disk says everything is fine. the system says the monitor and computer is fine. obviously it isnt fine.
: please help. remember to e-mail please.
: stewart