Hi. I would like some help to know what's wrong with my computer. About a week ago, I turned it on and the screen was all scrambled and nothing was responding. I restarted it, and it booted up fine. Then about 10 minutes after it was at the desktop, the screen went scrambled again and I had to restart it. This kept happening randomly, whether it be every 2 minutes, 5 minutes, 10 minutes or 5 hours...it just scrambles with lines all over the screen of various colours no matter what I'm doing or if it's on standby. Sometimes, it just cuts off from the tower and restarts. Since this issue occurred and me having to constantly restart it, there has also been a chainsaw-like sound coming from the tower as well. I don't know if it's the fan or power supply or what. Also, I don't have a graphics card at the moment since it died a while back so I'm using the integrated graphics from the motherboard. Any help will be appreciated. Thanks.