Just got this Mate 9. When connected to a charger the screen will not stay dark. It toggles between off and a new wallpaper image about every 5-7 seconds.
If a setting I'm not finding it...
Good gravy at the questions!! And amazingly generic. Not a newb .....
Original Mate 9 charger then later a generic charger just to see.
Got the phone used. This is after a factory reset.
USA version.