If it isn't detected, power off the unit for 40 seconds. Upon powering back on, tap the center of the screen repeatedly until the word "detected" appears in green.
A major distributor of firmware for these units. Access it via the XYAuto File Site (User: Xyauto / Pass: 123456 ).
Once completed (usually about 10 minutes), the unit will automatically restart into the new firmware. Critical Troubleshooting and Tips
Continue tapping until a text overlay states or shows a green loading bar.
Plug the USB drive into your 8227L unit while it is powered on.
Updating the can improve system stability, fix Bluetooth or Wi-Fi issues, and enhance the overall user interface. Because these head units are produced by various manufacturers (like Junsun, Lexion, or generic brands), it is critical to use the exact firmware version matching your hardware specifications to avoid "bricking" the device. Preparation Checklist