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I would double check cables. My original 50' cable worked fine for my Amazon Fire box at 4k, but not my Xbox One X. Got a new 18GB HDMI and now the Xbox works fine at 4k. So sometimes even if other things work, doesn't mean everything will.
Sorry, there was a problem. Please try again later.I have the exact same issue. The optima uhd60 supports 4K hdr 60 on Apple TV but not Xbox one x.
Sorry, there was a problem. Please try again later.Check the settings menu... it defaults to 1080p. It is doing 4K on my X1X just fine, but you have to up the setting to 4K.
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