If your Roku Ultra device isn’t auto-detecting HDMI, Local Geek Shelf is here to help! This issue can be caused by a loose connection, faulty HDMI cable, or incorrect display settings. Start by checking that your HDMI cable is securely connected to both your Roku Ultra and TV. Try using a different HDMI port or cable if necessary. Go to Settings > Display Type on your Roku to manually... https://localgeekshelp.com/category/roku-support/