Aura H2O dead H20

Hi, this is my wifes device, I think it may have gone flat during the latest update.

when it turns on the screen flashes black and white then shuts off.
nothing is showing on the screen just a white screen
what I have tried

Charge overnight

Factory reset many many times (holding power button tapping corners at bottom of screen).

pressing the reset button on bottom of unit.

any help would be appreciated.

Fixed it now thanks for the help