: If the unit fails to boot, try the "reset" pinhole on the front panel while the USB is inserted to force a reboot into recovery mode. factory settings code for your particular car brand? Junsun 8227L Android CarNavi firmware update

Once finished, the unit will reboot. The first boot can take up to 10 minutes. You may need to go into (Common codes: 8888 , 1617 , or 1234 ) to recalibrate your touch screen or select your car's CANbus protocol. Troubleshooting Common Issues