Xbox One brings up Turn off Menu and turns itself off.

Hey AARC Caboose,

Very sorry to hear about this odd issue. After reading the steps you have tried to resolve the issue, your console may need to be repaired. First, I would check to see if you have a nearby friend or family member who has an Xbox One console to let you try
their power supply. This will fully rule out if it is a power issue on the console.

If the issue replicates on a different power supply, the next step will be to visit our Online Service Center to begin the repair process.

If you're located in the US you can turn Captions off by pressing A during playback which will bring up a menu bar at the bottom of the screen, select the CC icon to turn them on or off. Or you can go into the Console Settings menu and change the options
there as well.

I'm assuming you are consulting around your xbox side (not wiring) but I will try and help with both methods.

Xbox Side:

Check if you have any power settings which may tell the xbox to turn off after so long.

If there is the disable it.

If there isn't then if your account is a child account check if the family timer is enabled - if so disable that.

Wiring Side:

Ensure your cables aren't stretching by dangling a major distance, if so this could be pulling the cable.

If this is not the issue then check the wire is in correctly.

Finally if it's non of these errors and you still have xbox warranty please contact Xbox Support.

Hope this help,

Brad.

I had this issue. It was a simple plug being loose in my brick.

Have you checked the power supply case to see if the light changes colour or if their is any loose wiring?