Four months ago we lost a 17 inch monitor suddenly...it started popping and suddenly went black (like an electrical short). Now this monitor is starting to jitter and sometimes pop, and the desktop images are keystoned (larger at the top, compressed at the bottom). The margins have been set to be parallel, and all setting have been adjusted in order to try to correct the problem. Yes, we degaussed. Are we about to lose another one? Why doesn't this happen to our old junky computers?