Why is my Xbox cutting on then cutting back off? How do I fixed that?

What exactly do you mean?

Do you mean the console turns on, then turns itself off again? If so, does it turn itself off immediately after turning it on, or does it happen at random?

Or do you mean that the image on your TV/monitor cuts in and out with a black screen?

I saw a post about the controller cutting out. Mine kept cutting out. Tried everything. Finally fixed it. Take battery cover off. Pack kitchen papper in it and put cover back on. Not cut out since.

dont know if my crashed but i just got an xbox one and didn't get a game till 3 days later i played 2 demos fine but when i got Forza 5 if i go to pause it go do something come back few mins later hit resume whole system cuts off then then yest my brother
just got done fixing his car bout to select a race and whole system cut off. now thats the only time the system has cut off like that when i was playing that game

Essentially i look at a lot of the fixes as merely cutting off hydra heads while the achievement solution cuts to the heart

Soooooooo, I have no idea how it happened but its working perfectly fine now. Here's pretty much the steps i went through i cleaned both the hdmi ports on my television and my xbox one s with the devices off with
isopropyl alcohol. Turn them back on 5 minutes later to the dismay of it still on the fritz. Cut everything back off in a fit of anger sat and sulked for 10 minutes cut everything back on and it was working.