I know it has been a while since the initial post, but this also happened to my mini 9 after my wife dropped my PC. Sure enough, the external VGA port worked fine, so I knew the PC was booting up normally. I basically took apart the whole netbook, and found that the cable attached in back of the LCD had slipped about 1mm, a very slight ammount. Trivial pressure over the connector made the screen flicker back on, and ultimately tightening up the connection made this stable. Consider a referral to the dell service manual (google it) to see how to take apart the Mini safely. Your mileage may vary.