Today my FP3+ (3,5 yo) suddenly switched off in my pocket. Tried to turn it on again, no response. Plugged in charger, no response. Pulled the battery and put in back in, no response. Plugged in the charger again, and suddenly there was a vibration. Few secconds later, there was a response to the on/off switch as well: the phone was starting up again. Battery was charged to 65%. It worked for a minute or so, then the screen froze but stayed lit at first. Few seconds later it turned black again.
Did the whole excercise again, and after a few minutes it turned on again. But unfortunately, this whole loop repeats itself every time. Each time I have to pull the battery and wait a while after replugging it, before the phone will turn on again. And after a few minutes it freezes and dies again. I’ts pretty laggy as well, in the few minutes it is working.
Anyone here who experienced this before and has a solution?
Update: when I keep the charger plugged in untill the phone freezes and turns black again, the charging light will stay on. Even if I unplug the charger. Only after pulling the battery, the charging light will turn off. So it seems there is still some activity in the background, although the screen stays black and there is no response to the screen, buttons or fingerprint sensor.
Update #2: Unfortunately it take’s longer and longer for the phone to get switched back on, with each time I try, Also it freezes quicker and quicker, each time it does switch on. Sometimes it freezes and blacks out even during startup-procedure. Fortunately I was able to get acces to a few apps/services for wich my FP3+ is needed in 2-factor authentication, but now even that isn’t possible anymore…