when I turn on my Dell Studio the screen remains black without backlights,
reading the post I tried to do two tests suggested by the Dell staff :
-turning on the laptop with hold the Fn key and then pressing the N key : the pc not answer on the screen but emits a series of beeps,
I have also tried to turn on the pc by pressing D key and in this case, the screen lights up and is colored black white red green and blue.
Suggestions or Diagnosis?
I already tried to connect the laptop to an external screen with a hdmi cable but both screens remain blacks.
i've also tried to run the diagnostics by pressing F12 without result.