I also have Vizio tv Full color 444 is grayed out.x1 box limiting settings in menu under advanced picture.
check your manual for the correct port to use for the set top box and connect it directly to that HDMI connector on the TV. don't thank 444 is supported just HDR10 (open source)
JesusSheep
Frequent Visitor
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7 Messages
5 years ago
I also have Vizio tv Full color 444 is grayed out.x1 box limiting settings in menu under advanced picture.
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Rustyben
Expert
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24.6K Messages
5 years ago
check your manual for the correct port to use for the set top box and connect it directly to that HDMI connector on the TV. don't thank 444 is supported just HDR10 (open source)
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