Get a load of this. I turned on my monitor and it had a black screen and the power light was blinking. So i did the Self test thing and the results fell in the category of defective. So i left it on for 15 more minutes, by then it would of been about 45 minutes since i first started it up. And the display came on. Now i'm happy and i want to know how to avoid the blinking problem again.
More aboutdell monitor problem
Have you contacted Dell regarding this? Sometimes, they are willing to help even though items are out of warranty.