My FP2 stopped charging. At first it wasn’t accepting charge from the plug socket. I charged it via USB from my Laptop. Some days later it didn’t charge at all. I bought a new Bottom Module and a new battery. (this was several months ago) This didn’t help either. In the meantime I was charging the two batteries with an external device to keep it working somehow. I’ve got a used motherboard from a donation. And voila, it works again, which makes me very happy and grateful for the donation
Now to the really weird part: I connected the FP2 to my laptop. And see there:
fastboot can actually transfer an image to the phone and flash a new OS image or Recovery System. That way I was able to reset my phone via TWRP and manually installing the FP2 OS. Unfortunately the problem wasn’t solved.
fastboot still worked fine as before, but
adb, charging, and data transfer wasn’t possible. Changing the USB-Mode in Developer Settings wasn’t possible. The change was only visible after the settings app was closed and reopened again.
Do you have any clue why
fastboot works, but
adb does not? Why can it transport data via
fastboot but not charge? Why can’t
adb transfer data while