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SM9400 TV Wired LAN disconnected notification appears


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Just got this TV 1 week ago every 15min - 1/2 hour I get the random LAN disconnected while in the middle of YouTube etc. 

I also noticed there is huge quality difference in video I play it’s poor quality on YouTube  I’m on a 100mbps connection off the internet There is something definitely wrong with TV firmware As there is very high latency,

can anyone please shed some light on this?

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