Failing battery sensor(?), unable to boot normally.
So my issue is that my phone believes that the battery is out of power. Weather the phone is on or off it charges just fine when connecting the charger, it just doesn't show any indication. When it's on it reacts by activating the display when connecting the cord.
I found a workaround to boot up the phone though, but I'd like to be able to know what's left of the battery anyhow!
To boot up my device I have to disconnect the battery and connect the charger. That way I'm able to boot up download mode. Once I'm there I reconnect the battery and choose start. The phone boots just fine and I don't experience any issues at all.
It all happened when I switched out my cracked display for a new.
I even tried replacing the battery, as well as the flex cable connecting the USB port to the motherboard.
The only thing I could imagine be wrong would be some hardware sensor failing, but then again I don't see how that could have happened.
Is that sensor on the motherboard?
A thing I haven't yet tried is a factory reset. Would that have any impact?