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Hi Ken, thank you for reaching out. To enable the 4k 120 Hz feature on this TV, set the HDMI signal format to Enhanced format. To change the HDMI signal format setting, press the (Quick Settings) button on the remote control, then select [Settings] — [Channels & Inputs] — [External inputs] — [HDMI signal format] — [Enhanced format]. REF: https://helpguide.sony.net/tv/iusltn1/v1/en-003/04-09_02.html Note: -120 Hz is supported by HDMI IN 3 and IN 4 -To display 4K 120 Hz, an Ultra High-Speed HDMI Cable that supports 48 Gbps is required. Refer to the cable specifications to find out whether a cable supports 48 Gbps. Regards, Sam
Sorry, there was a problem. Please try again later.I have an Xbox series X and the Sony XR55X90J tv. There are only 2 hdmi inputs that support 4K UHD. Hdmi3 & hdmi4. I put my Xbox on hdmi4 then I went into tv settings and under manage external inputs went to hdmi formats and selected the enhanced option. The dolby vision enhanced option would not allow 4K Uhd with 120 on the Xbox display settings. Hope this helps. It works for me
Sorry, there was a problem. Please try again later.HDMI inputs 3 and 4 are the 4K 120hz inputs.
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