My left monitor #2 connected via HDMI to my 2012 i7 Mini just turned greenish. What could cause this? Is it more likely monitor or Mini related? I've had the two new (Amazon) 24" Dell U2415's about 5 weeks. I wasn't sure about hot swapping the monitor cables to see if the discoloration went to the other screen so I did a restart as step one. (edit: wish I had just turned the offending monitor off/on first! ) The problem monitor, instead of the screen going black, like normal, it turned purple before fully powering down. Upon restart, it returned to it's normal look. A while back I noticed that white screen of this left HDMI monitor has an ever so slight pinkish and darker tint* than the right Display Port connected monitor #1. (*EX: when I drag this forum's white text box so it is across both screens.) I have the cables & power cords tie wrap (cable managment) to each monitor's stand, so thought I'd ask here before disassembling that. Both monitors are still at factory settings except that both have been changed Brightness (50%), Contrast (75%).