I recently purchased a new monitor cable on Amazon for 10 bucks, brand new, and it was delivered in 5 days. Any diagnosis by a tech is going to cost a lot more. Hopefully you don't have a cable that is hard wired to the monitor. By the way, the new cable fixed everything. Kathi >This morning in the middle of reading email, >my monitor suddenly went yellow. It's like a clear >yellow overlay - anything white is yellow, and it overlays >other colors, like my blue desktop background is now green. >I turned the monitor off and on, rebooted, no change. >It's a ViewSonic monitor, a CRT, not flat panel.