cannot reset display to macmini default

I had same problem on my Macbook Air. I accidently changed the display and the screen immediately went blank, leaving me troubled for hours together.

I could see a 600X800 resolution that too only when I connect an external display. If I change it manualy to the default, it goes back to the blank screen whever I remove the external display connection. I tried restarted in safe mode and then setting up the settings to default. no use, whenever I restart to normal mode, the display again goes blank. I tried zapping PRAM, no use. manually deleting some display settings files left the job useless.

Here is the solution I found.

I connected an external display to bring back my 600X800 resolution, installed team viewer and connected using my iPhone to my Macbook. Then I removed the external display resulting a blank screen again. But the teamviewer display on my iPhone told me the right story. I managed to change the settings back using my iPhone and I got my display back!

Cheers

<http://support.apple.com/kb/TS2213>