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Sorry you are having trouble here, HDMI problems are very common with modern sets, have you had any outtages or storms that may have caused this please?
Let me know by texting in the box usually below my reply
OK you need to speak with support on this email***@******.*** or ring them 1-***-***-****
I have nothing to do with this I am a tech using the site like you are ,when you have sorted that out come directly back here thank you