As long shot you may want to look if the cables are the same and with somewhat decent quality to both monitors. No need to spend fortunes, that's not the point but cheap cables are cheap for a reason.
I had issues before on three screens on the same brand cables (dirt cheap, but I learned the lesson). From flickering to different colors to simple monitors black screens as if the cables were disconnected, you name it.
Last edited by RomKnight; 11/18/23 12:26 AM.