My desktop doesn't recognise my second monitor

Posted 26th Dec 2020
Until today my 2 screens worked perfectly well. I have not done any changes at all (hardware or software). In display, it will not detect the second monitor (set as monitor no. 1). I can expand monitor No. 2, duplicate it or actually switch to monitor No. 1, but won't let me have both monitors working together. I have rebooted, checked drivers, checked cables, but nothing fixed the problem. Any ideas?
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