Try this if you are stuck on 80% install or on the green screen after the new dash update

I got the same problem after the xbox did update to the new dash in the preview progran i try the steps to restore the factory image but din't work and xbox costumer service din't help they tell me to send the console ($$$$) so i try again but this time
after let the xbox on for 2 hours and clear the cache and pres the side botton+ eject and then power and I keep the side and eject press the power botton start to flash and still in the green screen my account did sing in ( my kid tell me whe he was on the
other xbox ) so the os is there and I let it be and press the home botton and the new dash load up and the xbox was fine. NOTE: I DID NOT GET TO LOAD THE ORIGINAL FACTORY IMAGE THAT DINT WORK FOR SOME REASON. DO WHAT I DID AND THE XBOX WILL BE FINE IT LOOK
LIKE IS LOADIN A BIG UPDATE ON THE GREEN SCREEN LOOP. AND THE NEW DASH TAKES ABOUT 50 SECONDS TO LOAD FROM THE GREEN SCREEN. ALL WAYS.

I HOPE THIS HELP DO DONT GO AND TRADE YOUR XBOX RIGHT AWAY.

And post if this work for you.

:)

 

XBOX UPDATE STUCK ON "Preparing console" HELP

same here stuck at 80% turned of and when turned back on stuck on xbox green screen while waiting for diagnostic tool to download i kept hard resetting the console on the 4th attemt it started up fine and had new dash

 

Frozen home screen

What do you mean it opens at your home screen and then nothing? Are you stuck on the dashboard or is it a black or green screen?

If you are stuck on a black or green screen you can try the offline diagnostic tool that has helped people get passed the blank screen before:

support.xbox.com/.../system-updates-solution

 

Can you please explain better.