I have 2 monitors, I like using a dual monitor setup as often enough some programs crash and cant be tabbed or ctrl alt deletd or f4'ed or anything except restart UNLESS I have a second display inwh8ich I can move the move over and right click end process.
And now after some combination of fiddling that I cannot even recal of what the heck I have done dual monitor display nolonger works, I plug in the second display, i enable extend desktop to second screen and nothing happens it doesnt detect any signal and the monitor is working perfectly fine Ive tested it.