I already searched the forum, but I did not found this combination of symtoms.
Suddenly (akku was 80% charged) FP2 did not start.
If I put the charger cable into the FP2, the notification is solid red.
After a couple of minutes, the notification led goes off.
If I pull out the cable and put the cable into FP2 again, the same game starts again.
No other reactions, all still black.
I would repair my fairphone 2 myself, if i would know, what is damaged and if something damaged.
I hope , I can avoid to send the FP2 tofairphone for repairing.
Can you still boot into recovery or fastboot mode?
Recovery mode:
Hold the volume up button and the power button simultaneously until the Fairphone logo appears (up to five seconds)
Fastboot mode:
Power off the device and take the battery out;
Boot the Fairphone 2 into the bootloader (also called fastboot mode) by holding the volume down button and the power button simultaneously and putting the battery back in the device
Changing the bottom module --> same behaviour, but sometime it makes some noises like brzzzzz.
and the area above the battery will be warm / hot (under the "you are one of 17418).
I try a battery reset --> LED solid red, activating after 2 minutes… Phone makes brzz. and red light goes down.