My monitor has been a little funky previous couple days - it would flash white flicker and then won't turn on until a couple minutes. Well today the monitor wont turn on at all - every once in a while a white screen will flash with a halo like effect. I have it connected to the mac pro and tried switching ports, and tried connecting to my 16" mbp as well with no luck. Anyone give me an idea what may be wrong with it? I'm pretty much out of luck since Apple stores are closed.