Windows blank screen

Hello, my computer was working fine a couple days ago but while it was on the computer was accidently unplugged and when i turned it back i on i chose to start it on last known settings, after it went towards the windows loading screen, and after that the screen just went blank, the monitor is still on and theres usually 2 lights on the cpu but on of them is off, when its usually on, anyways normally i could log into my account but the screen is blank and the mouse or the keyboard stop functioning so i cant see the cursor or type anything even though they are connected, so any help on this problem would be much appreciated.