I have a Hp 2000 -2B43dx with Windows 8. I did a bios rollback and it stalled and now i have a black screen at startup, ive tried numerous resets n stuff from all the posts i googled and nothing is working ! Please help, thanks ! I did the windows button with the b, nothing. Took the battery out held the power 15 seconds hooked power cord and tried to start, still black screen. Tried the f10 f9 enter f10 enter..... black screen, dont have any recovery disks. Any ideas would be greatly apprec