Blank screen after windows 8 restore?

Hi, what it is is i tryed to put windows 7 on my lenovo g580 but because its updated and it gpt i had to format the hard drive to ntfs but then laptop diddent work. So i converted it back to gpt and reinstalled windows 8 but when i turn it on it all lights up (the screen and sounds from fan ) but no image on screen just a black lit up screen. If i put my other hard drive in it wich is also a gpt it works fine. Just wonder'd if anyone could help Please