Symptoms: No lights. No response from the head unit to the center console controller. Head unit responds to all other inputs from the steering wheel and dash.
Checked / tried:
- Fuses
12V/5V at the connector
Disconnect/isolated RoadTop Unit
Reset miscellaneous unrelated codes
Coded to force a reboot
Reset overnight with 12V disconnect
Replaced iDrive controller
What I have not checked, and is the only thing left I can think to look at is the 'touchbox' unit under the rear seat. Honestly, I didn't know that even existed until today, so checking the connections seems appropriate as well.
Any other ideas? I'm at a loss for where to go from there beyond throwing money at the service department.