Error Code
Cause Analysis
Troubleshooting / Solution
Upgrade...../upgrade failed
Unit may be defective
1. If rebooting the unit restores it to normal, then try upgrading the newest firmware.
2. If rebooting the unit displays the same old code, the unit is considered defective.
DFU MODE
DFU mode may be accidently entered
Unplug the power supply and reboot.
