I have the Toshiba Satellite L645D pc. This is a windows 7 pc, but I have upgraded it to a windows 8 pc. Nothing has happened to it for almost a year now. A few days ago when I try to go turn on my pc it would not start. I went online and search around, and it told me to press the f8, f2, f12, keys. Used to it would load the Toshiba logo screen; however, now it would go straight to the Windows 8 load icon. After the loading finished, everything would be just a black screen. I have tried everything, but it just would not work.
Please help, any suggestions on how to fix this issue would be greatly appreciated.