I have a hp 6010p and I accedently left it on hibernation overnight, later the following morning I turned my computer on and it was a bit laggy because it was loading something(s) then I held the power button down and it switched off, then I switched back on and I saw the hp logo, then it starting to enter windows 7, I saw the blinking - sign for a few seconds, then the screen went black (with no backlight or anything) then I saw the hp logo again, I pressed f11 f1 f2 f3 f4 ect but nothing changed, please help!