I have a ViewSonic UltraBrite A91f+ monitor. I have had it for about a year and a half. Yesterday i started making this high pitch noise, its coming from the rear of the monitor. It stops when I turn it off. If I turn my monitor off and leave it off for a while, I can turn it back on and it wont make the noise for a little bit. Is this a sign that my monitor is about to die/be messed up? I havent had it THAT long. Any help is much appreciated.