My computer monitor just made lines that were red, blue, white, silver and green in random order and there was also a beeeep that just kept on going in my speakers. Sometimes my computer would just go black randomly too, it's a new computer that I built by myself and the monitor is the same as the one I used on my old computer. My old computer didn't do this. It happened when I was watching videos off the internet. When I reset the computer it ask to start on window safe mode or normal and such while the desktop looks like it goes back to normal but at random times something will happen usually in 1-4 hours. Any idea as to why it does that and what's it's problem?