Dual-boot windows 7 + linux black screen during boot

Currently I am encountering an issue with my dual-boot (Windows 7/Fedora) Dell laptop.

Few days ago when i was doing some works using Fedora, the system was suddenly frozen. From then, when I turn on the laptop, the screen remains black until it boots normally into Windows (which is my default os).

When I tried to boot back into Fedora by blindly guessing the grub menu, I ended up every time into Windows. So maybe the option to boot into Fedora has gone for good.

I don’t know what is going on because all I can see is a black screen. Does anybody know what causes this problem, is it possibly due to the corruption of the files from Linux? Does uninstalling the Linux help?

Please let me know if you have any ideas to solve this problem.

Thanks guys.