When i start my dell laptop it shows the dell boot load bar and then my screen goes completely black. There seems no problem in my hardware as i ran a diagnostic test. My graphics card also works fine because it shows fine color and movement across the screen . i have tried booting in safe mode but not able to login. At present i am using windows 7 operating system. Please if anybody be able to tell me how to fix this problem as I am not able to utilize my laptop.
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