If you don't like the product you ordered, we are happy to provide a 14-days return or refund policy for items in "good condition".
If the product is the customized product and in the production, no refund or return without quality problems.
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.