Xbox only showing a green screen when powered on

Hi! My name is Pam. I'm an Independent Advisor and I'll be glad to help you today.

So the first thing we need to do is check and see if you can bring up the Xbox Startup Troubleshooter. Try doing this for me:

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 SYNC button and the EJECT button, and then press the Xbox button on the console. Continue holding the SYNC and EJECT buttons for 10-15 seconds. Listen for two “power-up” tones a couple of seconds apart. You can release the SYNC and EJECT buttons after the second power-up tone.

When the console powers up, you will see the Xbox Startup Troubleshooter. Please select reset then keep games and apps. No worries, no games and apps will be deleted. You just need to sign back in using the correct email and password.

I hope this helps. Feel free to ask back any questions and keep me posted.

on the power brick it shows green when console switches on and orange when off, only green console lights showing

MY xbox power supply shows a green light when it is plugged in the wall only (not in the console yet) when plugged in the console too it shows a green light again but here the Xbox doesn't turn on. It's fan only powers on and runs really loud (burning smell
too). the Xbox doesn't respond. I heard when the Power brick is plugged in the wall only it needs to have an orange light not green.when plugged in the Xbox too then it goes green.

could this be caused by the power supply?

Sounds like a power supply issue

MY xbox power supply shows a green light when it is plugged in the wall only (not in the console yet) when plugged in the console too it shows a green light again but here the Xbox doesn't turn on. It's fan only powers on and runs really loud (burning smell
too). the Xbox doesn't respond. I heard when the Power brick is plugged in the wall only it needs to have an orange light not green.when plugged in the Xbox too then it goes green.

could this be caused by the power supply?

Sounds like a power supply issue

are you sure or is it a CPU issue what of the burning smell from the console when power supply is connected?

Does the game simply show the splash screen and returns to the dashboard before the game's main menu appears, or is the game actually starting and crashes to the dashboard when you are supposed to press A or otherwise start the game?

Can you also try to hold the power button on the console for about 10 seconds, then turn the console back on, and make sure it shows you a green bootup screen with the Xbox One logo.

If the green boot screen is not appearing, hold the power button on the console again for 20 seconds.

After the console has finished starting and shows the home screen after the green boot screen, try to launch the game again.