I have a Samsung UN65JU6500FXZA 65" ultra HD TV. It works fine in most ways, but I can't use HDMI. As soon as I try to go to an HDMI source, it brings up an updating screen that never goes away. I have left it for days and it never finishes.
I have factory reset it many times and even manually updated the firmware with a USB stick, but it still does the same thing.
I think it just needs a main board swap. Do any of you TV gurus concur? Can you point me somewhere that can help further?