Monitor won't turn off or on it's just suck and the keyboard lights are on and everything is connected right

[ZenoKP]

Hello.So some time ago I faced a problem, when my monitor went power saving mode, and not showing anything from PC.I still can use this PC, because I found a trick to get around it, but I really want to fix this problem.But still right now I have tried many fixes and get nothing is working it just keeps showing me a black screen and my keyboard LEDs are on here is the video I recorded.https://youtu.be/HIRBwjYZLC8?si=AoBmLARcG8OyCZ4T

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