Why my screen turn gray?

I have a Dell had it for 2 years and I woke up this morning to lit I always put on the mode "sleep" during the night and he began to blink and suddenly TI turned gray and I find it is difficult to see that I even tried turning the brightness to 100% has not helped please Mary

The backlight or inverter has failed if the screen does not shine in Mode without failure or power on.

Tags: Windows

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