For backlight failure (image visible under direct light but no brightness), locate the LED_ANODE (positive) and LED_CATHODE (negative) lines.
I can provide targeted component-level troubleshooting steps to help you finish the repair. Share public link
Trace the signal path from the antenna gold pins to the RF front-end module.
If you need help identifying a specific component, tell me is failing (e.g., audio, charging, or display) or the specific error code / symptom you see on your power supply. Share public link