problem with the video card

When I turn on my pc it works fine, but if I go into any game or just leave the pc for a while the screen goes blank. When I investigated the problem I found out that it was because of the video card, for some reason it turns off the monitor even though all the wires are attached properly

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@konstantin37212 are you saying that inactivity turns the monitor off? Have you checked the power settings to make sure that you keep your monitor always on? What computer and what OS are you using? What have you already checked?

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