There are a few potential causes for your HDMI not working on your Xbox One. One possibility is that the cable is not long enough. If you have a shorter cable, try connecting it to the Xbox One using an Ethernet cable instead. Another possibility is that the HDMI connector on your Xbox One is not compatible with the cables that come with it. If you have any of these cables, you can try swapping them out for some that are compatible with your Xbox One. Finally, if you have a newer model of Xbox One, there may be a new HDMI connector that is available that works better with your devices.
