I have a standard two monitor setup. Primary is connected via HDMI and secondary via DP, both to my Radeon RX 580. This morning the secondary suddenly stopped working with the message “no video input detected”.
I’ve ruled out the monitor itself being broken, because I tested it with the HDMI cable from the primary and it worked fine. Unfortunately my primary doesn’t have a DP port so I was unable to test the DP cable in it. Therefore, for now, I have a new DP cable on order in the hope that it was just the cable going bad.
I’ve also just run the benchmark utility in Assassin’s Creed Valhalla on high settings and it ran just fine, with no GPU overheating. Therefore I think I can probably rule out GPU or PSU failure?
Pending the arrival of the new DP cable for more testing later today, is there anything else I can do to rule anything out?