This message means that the input signal is not HDR. Please make sure that the input content, device and cable are HDR compatible.
Please follow the below steps to verify:
1.Make sure the video content is encoded with HDR by looking for the HDR description or logo. For example, for YouTube, the video quality setting should indicate “HDR.” For streaming services such as Netflix, the HDR logo will be displayed next to HDR compatible content.
2.Check the internet speed and ensure it is fast enough to stream HDR content. For HDR content in 4K resolution, the download speed should be higher than 25 megabits per second.
3.Check the HDR compatibility of source device. The firmware of source device should be updated to the latest version and support HDR and HDCP 2.2.
4.Verify whether the cables support HDR. The cables that come with BenQ HDR monitors are recommended for the best video quality. If an aftermarket cable is used, make sure it fits one the following requirements:
•HDMI: HDMI 1.4 or later versions
•DisplayPort/DP to MiniDP: DP 1.2 or later versions
•USB Type C: USB-C certified
For more information, please refer to: httcps://www.benq.com/en/knowledge-center/knowledge/hdr-troubleshooting-instruction.html