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Not all TV backlights do the same thing. One glows a fixed colour; the other reads your video signal and follows the picture. The gap between them is bigger than...

An HDMI 2.0 sync box will cap your PS5 at 4K 60Hz even on a 120Hz TV. Here's what HDMI 2.1, VRR and ALLM change, and when you don't need...

HDMI sync backlights read the signal passing through them, so they need a Fire TV Stick, set-top box or console plugged in. Here's how the setup works.