my monitor starts flickering after plugin

[Windows 11]

Hi, I'm using windows 11 these days on my ROG Asus laptop. my laptop was working fine for 3 years but suddenly last week after a long update from windows I'm facing with a disturbing problemat first I observed few little horizontal lines on my monitor and also shadow of desktop icons on other pages so I thought my monitor has a problem and I have to change it. but then I found out the problem only will starts when I plugin my laptop. right now the problem is not only few horizontal lines, I will lose 3/4 of my monitor when I plugin the laptop, it will go completely dark or sometimes flickering

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