TK850 will automatically detect and display compatible signals only. So, if there is no image after connecting an image source to HDMI-1 or HDMI-2 then please check step by step to make sure you are sending a compatible 4K HDR signal to the projector.
* USB 3.0 (Media Reader) supports HDR10 only.
Firstly, please press the Menu button on the remote control and select the Information menu to determine whether you are receiving a HDR signal.
• Check the projector's Information menu to make sure your 4K player output is set at the following compatible resolution.