I'm afraid it looks as though you have a hardware problem. This may be the reason that the unit was sold.
Things to try before returning it:
1) Update (yet) again, by whatever means appears successful.
2) Following this, do a "Restoring Factory Presets and System Settings" as described in the UM.
3) Consider trying a different power supply.
If these fail, you should return it to your vendor, or send it in for service.
