my FP2 is having troubles since one year or so, it randomly stops (and sometimes reboots). I could not identify the gesture/conditions that make it stop, it can be while I have it in my pocket, on a table, charging or not or while using it.
It’s not strictly speaking random reboots because sometimes the phone simply stopped. Sometimes, to restart it the power button alone did not help and I discovered that by applying a small pression to back of the phone (near the camera) or by slightly bending it (top-left to the back) made it start. (disclaimer: do not do this if your phone is still under warranty)
I don’t think that the power button itself is faulty since it works flawlessly when the phone is up and running.
It was annoying but usable (at most 1 stop/day)
It started to be extremely annoying just recently, I could no longer trust my phone, when I take it out of my pocket or from the table it was almost always stopped.
I decided to open it to see if I could spot a loose connection.
- it stops randomly (very often, nearly unusable): the phone is almost always off when I want to use it but I did not stop it
- it reboots randomly: when I want to use it I need to re-enter my sim card pin, I can feel it vibrate in my pocket (sign it has rebooted).
- it’s sometimes stuck in a reboot loop (vibrate 0.5sec -> logo) and may start to vibrate endlessly after 2/3 reboot loops.
- if it stopped on its own the power button does not work I need to apply a small pression to the phone or slightly bend it to make it start, it has happened that I needed to remove and re-add the battery. It’s still unclear if there’s a special pattern here, what almost always work is to slightly bend the phone while pressing the start button.
- if I stopped it manually I can use the power button to start it
Here is what I tried to narrow down the issue (I use android 6 with the latest fairphone OS 18.04.1) :
- disassemble/re-assemble the phone
- reproduce the issue with and without the slim case
- with and without the simcard (I don’t have any sdcard plugged)
- with and without wifi (plane mode on/off)
- with or without charger plugged
- I did the drop test to test if the battery was moving, the phone did not stop
- Reset the phone to factory defaults
- Temperature does not seem to be related, it happened many times during the re-install process when e.g. I had to enter my google credentials.
- Tried to put a little piece of paper below the battery to make it connect strongly to its socket
- Use another battery
Strange behaviors (sometimes):
- reboot loops, sometimes the phone just gets stuck in a reboot loop (vibrating a bit, showing the logo)
- endlessly vibrate (if I don’t stop this reboot loop the phone may start to go crazy and start to vibrate endlessly)
Things I noted when opening the phone the first time:
- extremely hard to pull off the screen
- most of the screws were very loosely fastened (I did feel a very low resistance when opning them)
- 2 screws of the core module (TORX head on the left under that metal plate) were half fastened (no resistance at all I could even fasten them one or two more loops).
(note that I already contacted the support, went through their questions and they said the core module needs to be replace but my phone is out of warranty but I can’t afford the price of new core module).
I would like to open the core module because I’m almost sure now that something is loosely connected there but it does not seem openable the 2 screws left are stuck behind the screen connector which seems glued, did someone ever tried to do this?