From time to time, one of my desk monitors would take on a yellow cast. It happened recently and was persistent in lasting about three days. I was thinking the monitor would have to be replaced when a co-worker came by my desk, glanced at the monitor and said “you’ve got a bad connection.”
At that time we checked the monitor cable and found it was secure, but the “bad connection” idea made me wonder if perhaps my laptop wasn’t properly seated in the dock. I undocked and then docked again, taking care the laptop was firmly locked into place. When the monitor came up this time, it was back to the normal color.
Thanks my to my co-worker for recognizing the problem right away. And when checking connections, it is important to think through every link along the way.