smartphone presenting with the message on the screen "no command" can not give the hard reset some way to reinstall the operating system?

can you boot your device in recovery mode and perform a factory reset? http://bbs.blackview.hk/viewtopic.php?f=192&t=334922

I already did the hard reset anyway, it still has the same problem, it has times it returns to normal but when I turn it back to the same problem, is there any way to reinstall the room or root?

diogoaleff wrote:

I already did the hard reset anyway, it still has the same problem, it has times it returns to normal but when I turn it back to the same problem, is there any way to reinstall the room or root?

It looks like an hardware fault. I suggest to contact your seller to have your device replaced under warranty.