HP Pavilion DV4-2045DX at startup screen 'black '.

My HP Pavilion DV4 at startup screen 'black '. It normally happens with all audio prompts password and subsequently entry, audio acceptance... password screen but 'black '. This problem is intermittent, but happens on a basis more common. Any suggestions would be greatly appreciated.   Peace

Screen is black from the beginning. Hooked up a monitor to laptop and everything's fine. Appears to be a screen, a problem of connection or link screen. Thanks for the input.    Peace

Tags: Notebooks

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