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  • Pressed '<Windows>' and '<P>' keys to switch the display to the second monitor or extend across both displays? Do you see the extra display in your display settings? (Right click on desktop and select "Display settings", then scroll down to the "Multiple Displays" section) The monitor may well be working but you have not told Windows to use it.
    – Mokubai ♦
    Commented Jan 6, 2020 at 14:10
  • Right click your desktop and click "Display settings". Make sure you have "Extend these displays" selected.
    – NiallUK
    Commented Jan 6, 2020 at 14:14
  • Only one monitor works, which is the main from the beginning. It doesn't extend nor change. If I start with the main monitor being the 60hz one, it will keep it that way and the 144hz will not work.
    – Skelun
    Commented Jan 6, 2020 at 14:25
  • But do you see it in "display settings"? We get that it "will not work" but your question fails to tell us whether you have actually enabled it using the appropriate settings or whether it even appears to the operating system in the first place. Both Niall and myself told you where to go to give us information and to turn on both screens, if available.
    – Mokubai ♦
    Commented Jan 6, 2020 at 15:34
  • Yes. Everything appears like it should be working but it doesn't. Sorry if I didn't made it clear.
    – Skelun
    Commented Jan 6, 2020 at 17:43