A:Answer Thank you for your inquiry! If the HDR option is greyed out on your Insignia NS-55UQFL26 QF Series QLED Fire TV, even when using supported apps or sources, it’s likely due to the TV not detecting an active HDR signal. This setting typically becomes available only when HDR content is being played. To troubleshoot, first ensure you're using a compatible HDMI port and that it's set to “Enhanced Format” in the TV’s HDMI settings. Also, verify that your streaming device or console is outputting 4K HDR and that you're using a high-speed HDMI cable. Built-in apps like Netflix or Prime Video should trigger HDR automatically when playing HDR content. Additionally, check for any available firmware updates in the TV’s settings, as software updates can resolve compatibility issues. If all else fails and HDR remains inaccessible, it may be a system-level limitation or a hardware issue, in which case contacting Insignia support would be the next best step. Keith | Insignia Support
