Having an issue where the GPU settings were changed when I installed and tried to play a new game. This caused the monitor to display "Input Not Support". After connecting a TV to use as a monitor, I was able to see the screen again. Read through forums and everything pointed me towards a possible driver issue. I went through the uninstall, used DDU to clean up any lingering issues and rebooted.
After the reboot, my original monitor worked again with the base windows display card. I downloaded a new driver from the AMD site (AMD Radeon R9 380 for Windows 10), and installed. Immediately after the install finished, my screen flickered, and went back to "Input Not Support".
I have tried changing the resolution through the AMD settings program, which points me back to the windows display settings. This did not yield anything successful.
I should also state, I can connect any other device to that monitor and it works fine. It seems to only happen with this computer, when the AMD drivers are installed.