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Display 2 monitors but only have 1

Sound Cards - Tech Support Forum - www.techsupportforum.com
Hi. I just started getting this problem. My pc thinks that I have 2 monitors installed, and that my actual monitor is the second one. When I start my PC, My screen goes blue and says that there is no HDMI cable connected, but after a min will change to my login screen. Kind of irritating as I my computer has a secondary issue where it doesn't always start on the first boot (I believe this to be due to having two hard drives, and the start up settings are wrong [Not sure as my motherboard uses UEFI, which I'm not familiar with]) and so i need to do a quick restart. Any help would be great.

Thanks

BTW My PC has a Radeon RX 460 graphics card


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