Sony ILCE-7RM2 Repair
This camera was dropped and reads “Camera Error” when power turns on.
I was able to fix it by re-seating the sensor, it took about 3 hours to doing it.
By the way, I found something interest.
The time/date backup battery is located behind the main circuit board.
This means there’s no way to replace the battery by the user when the battery’s lifetime has reached.