Xbox One not showing up on screen

Did you do a hard reset ? Hold the power switch on the console for 10 seconds ?

You can try this maybe , it boots it into low res mode , kinda "safe mode " I guess , worth a shot.....

Your screen is blank after you turn on the console

•Confirm that both your TV and Xbox One console are turned on.

•Check that your TV is set to the correct input signal (HDMI).

•Check that the HDMI cable connection to your console is secure.

•Check that the HDMI cable connection to your TV is secure.

•Check that the HDMI cable is connected to the "out to TV" port on the console.

•Perform a cold boot on your Xbox One console by holding the power button on the front of the console for approximately 10 seconds, and then turn it on again.

•Reset your display settings. Here's how: 1.If there's a disc in the Xbox One console, eject it.

2.On the console, press and hold the Xbox button for five seconds to turn off the console.

3.Press and hold the Xbox button and the Eject button until you hear a beep to turn on the console. You will hear one beep right away and a second beep 10 seconds later. The power light will flash on before the second beep. DO NOT LET GO until the second
beep occurs.

Note This will boot your console in low resolution mode (640 × 480). To reset this setting, go to Settings in the guide, select Display & sounds, Video options, and then TV Resolution.

4.If you are required to complete these steps on every boot-up, you will want to change your TV connection to HDMI as shown in step 3 in the next section, "Your screen is blank and you use an AVR in your setup." For more information, see How to adjust the
display settings on your Xbox One console.

•Try plugging the HDMI cable into a different HDMI port on your TV.

•Try using a different HDMI cable to connect your console to your TV.

•Try connecting your console to a different TV.

Though to complicate things further, the Xbox One DOES show up when I go to "Media Streaming options" under Network and Sharing Center and show devices on Local network... it is set to "Allowed". But it only shows up in the one screen, and not from the devices
manager or as a "Play To" option.

When I turn on the One I get the usual green screen but after that I get a long black screen and the the Xbox logo shows up right in the centre of the black screen. It's almost as if it tries but fails to grab the update. Also, unfortunately, I only have
the one Xbox One ha.

Hey there Lewicki,

Sorry to hear you're having issues connecting your console and TV.

Brandan and Dory both have great suggestions. I would recommend that you try different HDMI cables and try your own HDMI cable on a different TV.

Another step I would suggest is to try resetting your display settings. The steps below will help you.

1. Remove any discs from the disc tray.
2. Turn off the console.
3. Turn on the console.
   Note If you are using an Xbox 360 Wireless Controller, turn on the console by using the Guide button on the controller. Make sure that you use the player 1 controller when you do this. The player 1 controller will have the upper-left light illuminated.
   
4. As the console starts, on the controller, press and hold Y while pulling the right trigger. The display settings are reset to the default settings, and then the console automatically restarts.
   

Let us know how that goes and we'll go from there. Happy gaming!