Onn Factory reset

I have a new Onn box. Tried to run Launcher and Wolf after turning on and off debugging. Screen went black. Nothing is working. How to do a factory reset.

Go here. Thx to: Hak Nuk Man

https://www.youtube.com/results?search_query=how+to+reset+onn+box+4k

stock android is so nice
dnfe

Did u get any help having same problem