Windows 7 Cant access any part of windows

Hi i am only just getting this problem after restarting my computer it just goes to a black screen no windows starting logo and then my monitor switches of but yet im still in signal when i turn it back on. I have tried going into safe mode but still the same happens. I have tried start windows in last good config but still get the black screen i have tried all of the usal stuff but yet i still get that black screen. It cant be my graphics card its still in signal when goes to bios and when i go there and click on the hardrive boot from it goes to windows starting logo but it takes long time and the goes to blu screen and restarts to quick for me to see what it sais. If anybody knows whats going on here please help remember i cant access windows anyway.