Hello, i have a same probleme. i have installed the new window and after the window instalation system didn't show the disply. and showing the phrase at the screen "cannot disply this video mode" please help me to out
More aboutsystem display video mode
You are trying to feed a signal to your monitor that it cannot handle.
Try booting in Safe Mode and when the desktop shows up, change the video mode to the lowest one possible - probably 600 X 800. Then reboot and see what options that you do have.