My Xbox One immediately turns off when I try to turn it on.

Hello Maggie P,

Nilay here and I'm glad to answer your query today.

If you're unable to get to the dashboard at all to do the factory reset you need to access the Troubleshoot screen by using these steps :

Unplug the network cable if you're using a wired network connection.
Power off your console, and then unplug the power cord to ensure that the console is completely powered off.
Wait 30 seconds, and then plug the power cord back in.
Press and hold the BIND button (located on the left side of the console) and the EJECT button (located on the front of the console), and then press the Xbox button on the console.
Continue holding the BIND and EJECT buttons for 10-15 seconds.
Listen for two “power-up” tones a couple of seconds apart. You can release the BIND and EJECT buttons after the second power-up tone.
From there you can reset your console.

Good Luck
Regards

I've had the same problem. Mine started a few weeks ago. Mine happened around the time of a bad lightning storm, and I had everything plugged into the surge protector, but was useless.

I try to do a hard reset and when I first try turning it on, nothing happens. Then after a few button pushes, I get the light on and it shuts off. Then after a few more, I even get the fan going and then it shuts off. Never get the Xbox screen.

I have also tried all the options and replaced the power cord because some mentioned the 7a cord that came with it originally wasn't enough power. Nothing. I am considering trying to replace the power supply or motherboard, but don't know if its worth spending
$60-80 for a part and then it not work, especially when the new system is out soon.

I was hoping there would be more people on these forums posting this issue, but doesn't seem that way.

My pleasure and hope to see you online and back up and running sooner than later.

Thank you for your help

If none of those steps worked I would recommend opening a warranty check and possible service repair. But first before doing so, try as another troubleshooting step moving the console to a different room/tv and use a new HDMI cable if available to see if
it responds as it almost sounds related to detection by television input but could also be motherboard related and need service. Here is the service link for you and hopefully they can further help if the changing tvs test doesn't help you.

https://support.xbox.com/help/hardware-network/warranty-service/getting-your-product-serviced