The monitor for my desktop hums/buzzes when a have a white background with a lot of black text maximized. I'm sure it would do it in other cases but this is the most obvious. I usually hear it when I am looking at a text file in an SSH client.
What causes this? Is it clear that it is time for a new monitor?
I can provide details about my hardware if that will help.
It's a Dell 2001FP.