Recently my desktop has started to randomly sort of crash in a way. Sa for it's only happened when I'm watching a video with a few tabs open, and what will happen is my monitors go black and say there is no signal, and the sound will cut off immediately. The computer lights stay on and the first time I was able to turn it off by holding down the power button but this time i had to flip the switch on the psu. When I get back to my desktop all the icons will have been shoved to one screen and disorganized but there will be no other sign that anything weird happened. I really have no idea why this is happening and any help will be appreciated.