Controversial posts made by bontemps

I don't know if i am in the right category but i don't know where to put it.
Actually, i have a meizu pro 5 on the last ota of ubuntu os before they stop supporting it.
And i changed the passcode to an 8 caracters one using the passwd command (in the terminal emulator) . But the phone take only 4 caracters when unlocking.
So, i was unable to unlock it any more.
There, i tried to hard reset it with the recovery mode. But it didn't work, so thinking that it will clear the users
data i used the fastboot -w command (in the fastboot mode of course).
And now, when i try to boot it, the meizu logo just appear than stay a few seconds and disepair. Befor starting again the same way and it continue like this booting and exiting.
So have you any ideas of what is going on and what to do to make it work again (on ubport of other)?
Sorry for the anglish quality.