To Restart the Device there are two options:
For the first one you will need a magnet (which hopefully was provided in your dev kit).
First option:
- Put the device in a Charger and make sure it is actually charging(red charger LED is on and green LED is either blinking or constantly on if battery is fully charged)
- Take the Magnet and hold it to the lower middle of the Display (a really short “bringing it near the screen” is enough)
- Wait a few seconds, after that the device LED should light up blue and the device is restarting.
Second option:
go to the settings page on your device (the gear icon). Press the forward button (right bottom corner) to forward to page 4, where it says reboot on one of the selection widgets, press that and the device will go into fota mode and then reboot.