This type of problem can occur if the e-reader was not sufficiently charged at the time the update was started.
Try to let the e-reader battery charge overnight, and press the ON/OFF button for a few seconds the next morning to restart it.
This type of problem can occur if the e-reader was not sufficiently charged at the time the update was started.
Try to let the e-reader battery charge overnight, and press the ON/OFF button for a few seconds the next morning to restart it.