I came home one day to find that my monitor was no longer displaying my PC via HDMI. After a lot of testing, I've found that the monitor works with other PCs via HDMI, and my PC works with other monitors via HDMI, but they don't work together. All I get is a black screen. I know that my PC's resolution is set to one that my monitor can display. I've tried several different cables. I have absolutely no idea what the issue might be, and I'm pretty much at my wit's end here. Any ideas?