Xbox One X now only shows a black screen and doesn't even show the start up intro

Same here, just updated my Xbox last night, everytime I start it up it only shows a black screen... Pressing home button only brings the shutdown menu, if I choose "report a problem" it shows the Xbox Feedback screen but then goes back to black

I not even sure that it's the preview program at all. My screen now loads up to a blank black screen after the my games and apps logo repeatedly pops up and disappears till it finally disappears completely to a blank black screen. It only shows the logo
and none of my games and it also showed me sign in.

When you start up dark souls does go a black screen and not even show the loading bonfire?

Do you mean the Xbox One X intro before the standard green startup screen is missing? If so, go to your display settings and check if the output is 4k. If it is, then theres nothing to worry about. Your X is working as normal, only the startup is
missing. Theres no need for a replacement

turned on xbox today start up screen is back on now...thku for your help

Usually, when the Xbox shows a black screen for quite some time during startup, it's because of a logical corruption of the file system. Maybe the console was shut down unexpectedly due to a crash or power outage.

Similar to a PC doing a checkdisk when it wasn't properly shut down, the console also checks it's file system for logical errors, which can take up to about 10 minutes. Unfortunately, while a PC at least shows a percentage counter or sometimes even lists
which part of the file system it's checking, the Xbox One only shows an empty black screen.

So when the console shows you a black screen, let it run for about 10 to 15 minutes and see if it gets to the main Home Screen. Then try to restart the console by holding the Xbox button on the controller, and choosing the button to restart the console.

Does the console start faster without the black screen now?

If not, please use the Send Feedback button on that screen when you hold the controller's Xbox button to file an error report to the engineers at the Insider program.