When i switch on my j5 then said in the screen, no command

[Android Central Question]

Why what happened when I switched on my Samsung Galaxy J5 mobile phone then said on the screen installing system update and then automatically said that no command.

 

[mustang7757]

Where you see this on lock screen?
I'll leave a Link to register so you can communicate here as a guest account you can only post questions but can't reply.
https://forums.androidcentral.com/showthread.php?t=409154

 

[Kizzy Catwoman]

Is this before you boot into android? Is there a picture of an android on its back when it says no command?

 

[B. Diddy]

Welcome to Android Central! Force a shutdown by pressing and holding Power and Vol Down for about 20 seconds. Then see if you can power on again normally.