I have been having an issue recently where my main monitor is dull when my PC starts up. My 2nd one is fine with no issues. I have tried 2 different HDMI cables and both are giving me bother. I tried both ports on my monitor too, so I'm not sure if my HDMI port on my RX 5700 GPU is causing the issue. Although, all I have to do, to fix it, is unplug and re-plug my HDMI cable and it works fine all day, no issues. My windows 10 and GPU are all up to data, and all drivers are up to date according to the Radeon software.
Wondering if anyone else has had this is issue and could assist.