I Am having the same issue ... In a big trouble .. Need help please ... I am left with a Screen with no display and tv is not

Mar 15, 2018
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I wanted to project my laptop screen to my Tv with HDMI cable . So I switched on duplicate my screen and after that my Laptop screen went blank .. and tv is not showing anything either ... now when ever i start my laptop it doesnot show anything in my screen .. Need help badly!!