Xbox Series X Display is stuck on low resolution
Turned on the Xbox Series X this evening and the TV showed a very low resolution picture.
Symptoms
In the video settings for the Xbox the only choice was the selected 640x480 mode.
Solution
Check the HDMI cable between the console and the TV. In my situation I discovered the HDMI connector was not properly connected in the back of the Xbox and pushing it in correctly instantly returned the display to the proper resolution.