My Fairphone 2 stopped working about two weeks ago. I felt that it went very hot in my pocket. When I took it out, it would not light up. Connecting it to a charger did not change anything: The red light switches on after a while (but pulsating slightly), and switches off again, no sign of charging, the screen stays black. I thought that it would probably be a battery problem and bought a new FP2 battery. Still no change. What could possibly be the matter? Which of the modules is the most probable cause? What can I do to further diagnose the problem? Thanks for any hints.
For information, I was running Lineage OS 15.