I use dual monitor screens sometimes gets stuck or become green screen, just green and no words but can still hear audio from videos or game, once every 3-4 weeks, this is usually not a problem cause I would just hold the power button on my PC to force shut down and when I relaunch everything to back to normal. This time it green screen and get stuck, this however I pressed Ctrl Alt Del to get the task manager up and caused the second monitor to go black. I forcefully shut down my PC and relaunch it but my second monitor said there was so signal. I tried to switch the cables around a bit and found out that the HDMI output connected to my second monitor had stopped working, I found out after connecting my second monitor and its cable to the first montior's HDMI and the second monitor connected but the first monitor connected to the other HDMI says no signal. I am a beginner to this and had a friend help build this PC