My desktop monitor only shows a white screen

So as the title says, my main display monitor is showing a white screen, from the point of startup. Before this started happening, I started seeing a blue screen effect over my regular desktop. I have two monitors, my main one (which is the one with the problem) and a smaller one (that one works fine). You can see only a white screen on the big screen but on the smaller monitor you can see perfectly fine. I tested the big monitor with my PS4, and it works fine. What could be the issue? The monitor with the problem is connected through a VGA cable, and the smaller working monitor is hooked up with an HDMI. It really bothers me, because I have them setup as extended, so I can't really see what I'm doing. Please help.