Cause 1: Power supply fuse burnt out Solution: Replace the same model fuse.
Cause 2: Other factors causing the microprocessor to work abnormally Solution: Restart the key.
Cause 3: Main unit plug disconnected and not reconnected within 5 minutes Solution: Reconnect the wiring harness, lock the car for 2 hours, keep the mobile phone and remote key more than 20 meters away from the car, and check if the screen can light up after 2 hours.
Cause 4: Main unit or screen plug not connected properly Solution: Reconnect the main unit plug.
Cause: Backend data error Solution: Reconnect the main unit plug.
Cause: Power line protocol line not connected Solution: Reconnect and inspect the wiring connections.
Cause: You can enter the settings interface to set it. Solution: Press and hold the right scroll wheel on the car steering wheel for 3 seconds to enter.
Cause: Child lock function not enabled on the original car's head unit Solution: Enable the child lock function in the original car's settings.
