My Xbox series S goes on "dark" mode after like 1 sec once turned on. Although no settings...

Hi Egija, my name is Rodrigo. I'm an Independent Advisor and a member of the Microsoft community and I'd love to assist you today.

I am sorry to hear that.

Have you tried to use a different HDMI cable or change the HDMI port it's connected to on your TV?

Please, reset your console to make sure it's not a software issue.

Before you continue, make sure you've got the account sign-in information. You'll need it to log back into your console after the reset.

You can follow these steps:

Press the Xbox button to open the guide.

Select Profile & system > Settings > System > Console info.

Select Reset console.

Select Reset and keep my games & apps.

Let me know if it works!

Source:

https://support.xbox.com/help/hardware-network/console/reset-console-to-factory-defaults

Everything is set like that but i noticed it only goes in instant on mode when saying xbox off but when i panually turn the xbox off it won't go in instant on mode after last upfate

I had the dark mode setting on my xbox. Turned it off and it works fine.

Which type of Xbox do you own?

If it's a Series X or S, you no longer have to put it into "instant on" (now called "sleep") mode for downloads to continue once the console is turned off. They will continue in "shut down" (previously called "energy saving") mode too.

In that instance, it's more likely to be some kind of router/networking issue.

i've tried to reset by pressing the sync button, the xbox logo blinked fast, and i turned off and on again, it stay on but the problem is not that iot suddenly turn off, it stay on as long it don't go in sleep mode, at that point when i try to turn it on it will shut down after 1 sec, it stay on just enough to be seen by the computer, to solve i plug the cable for one sec and it work again as intended in wireless mode

now, i just wait for it to go sleep and see if it will turn on again

edit: the reset with sync button seams to have resolved the issue