Monitors will not go on after adjusting settings for Video card

I took some work home today with the snowstorm and when I tried to open a project file in After Effects I had Element plug in problems. I thought it might be a settings issue on the AMD video/graphics card, I switched on Accelerated graphics setting and my monitors (I have 3) shut down, now I can not get my monitors to even come on and see my computer. What did I do to my computer? HELP. Thanks.