I have the same problem. I press my power button and the screen remains blank. I looked at the LEDs to see if power was coming to the unit and it was (lights all turned blue). I then checked my monitor cables and connections and they all seemed fine. My screen has the auto-on (option is checked).
If I turn off my car, the screen will stay on because it is running off the cigarette lighter so if the I turn the car back on the screen would go blank. Now, the screen doesn't turn on at all! I checked the lights and they still come on but the power light also has a red light on with it.
Let me know if you guys have any ideas.
I am going to try using the wall plug and see if it is my ac adapter.