Monitor Buzz on start -up

Monitor Buzz and keeps shutting off on startup, I turn on and off a bunch of time and reset the monitor. Once it is running it runs fine all day. My monitor recently started buzzing when I turned it on. Darker display colors seemed to make it louder; if I put something on screen that filled it with white, like a blank page on my browser, it goes almost inaudible.

After a while, it seems to go away on it's own.