Hi, I have a Sony Notebook model PCG-81214L with Windows 7 Home Premium and it will not boot up.
When it starts up it displays the Sony VAIO splash screen for a few seconds and then it displays a black screen with a flashing dash. I have left this on for hours with no change in the display. I have also tried to boot in safe mode but it doesn't get to the point that safe mode menu pops up. It only sits on dreaded flashing dash screen.