Interesting.
I just did that - just out of curiosity as I don’t have any problems with my FP2 - and it results in a screenshot, the volume rising to max and after 20 seconds a reboot. I get the same result if I press power + volume down for 2 seconds, then volume up for two seconds and then power for 20 seconds.
What exactly should this reset?
Its essentially a hardware triggered OS ‘hard’-reset, same as pressing the reset button on your PC.
It essentially overrides anything forcing the phone to reset as deep as possible without loosing data. Sorry for not being able to describe this better 
I first seen this work on a Oneplus One with the symptoms above and a few times on the Samsung Note 4 of my girlfriend which tended to hang up so nothing except removing the battery or this keycombo worked.
Also, when doing it in a running system: No warranty for volume settings and or screenshot as Paul mentioned 
On a iDevice its keep pressing the Home button & Power at once.
Best regards
Just long press power key long enough will trigger the hw reset.
Confirmed, this also triggers a hardware reset, even without screenshots and or volume changes 
3 posts were merged into an existing topic: Should Fairphone have invested more time in quality control (see the amount of FP2-bugs)
I decided to put my problem here, although it’s also similar to Screen blurs and lines appear and to Fairphone 2 unusable while charging.
I’v used my FP2 for one week. At first, every thing went well with charging and the screen. After 5 days, my FP2 started flicker and after some seconds, the screen turned black and I couldn’t switch it on again. After a while, I could switch it on again and everything was ok again. This happened especially while charging.
Yesterday evening it was the same, so I thought I’ll switch it on this morning, but for this time, it didn’t work. If I charge the phone, there’s only the red LED which turns to green after a while, but nothing else happens. I tried several things:
Is there anything more I can do?
That indeed sounds like a mixture of many problems, but it’s save to say there’s something wrong with your phone. I’d contact support to get a replacement phone. (Unless of course they knew a fix for your issues.)
thank you so much for answering that quickly!
Yes, a lot of problems… I already contacted the support last saturday because the camera doesn’t work. Till know, I haven’t heard anything from them. But: also there, I tried a lot of things and nothing worked. So, probably a replacement is the only thing to do.
Well you’ll probably not hear back from them on a weekend, but I’ll summon @anon48893843 to make sure someone answers your support ticket.
Thank you for your support!
When I turned on my new fairphone for the first time, the screen turned on and showed the “fairphone-logo”, but nothing else. I tried two diefferent chargers wtih different ampere and one batterypack with no result. No reaction when I pushed the start-button. I was just about to dismantle the whole thing to remove the screen when I tried the soft reset that @detobi suggested. The phone vibrated a few times and when I released the buttons it started as it should! I have also succesfulle charged it with my 5V 0,8A charger. Thanks for the tip!
I have had similar problems:
This is exactly my issue and worse when charging. But it was worse in the beginning. Have been working better lately.
Trying the fix with the settings now.
Thank you!
I have the same problem. Worked normal for one day and getting suddenly black screen. Only difference I have is when I put it on the charger with battery I get the red light. So I REMOVED the BACK COVER, and simply pressed the on button without the back cover case on and it worked !!!
I have my FP2 for 2 weeks. First it worked perfectly fine (no unusual problems), but a few days it suddenly got a black screen and won’t turn on anymore. If it is plugged in the led light (left corner of the screen) works. I tried charging the battery for a long time, holding the power button for a long time, removing the sim-card and battery multiple times, and removing the back cover, still nothing.
After reading this thread I also changed the cables (tried a new four threaded data usb cable and a 5v and 1A charger), still the same.
I also haven’t dropped it once, it hasn’t gotten wet, no dubious apps installed…
What can I do to make it work again? Thank you!
Hallo Michaela,
I have exactly the same thing, have just bought a new cable and will see, I also use Mac and hope to use FP2 if it gets itself going. Was wondering if you wanted to get in touch, am not in Munich at the moment, but I live in Lehel normally and will be back March 10. Debbie
Hallo Debbie, dann können wir doch deutsch schreiben. Ja, gerne, ich habe in meinem Bekanntenkreis leider niemanden der sich das FP2 leisten wollte. Hier ist meine private Email, schreibe mir, gerne:
info@michaila.de
LG
Michaila
Me and my partner got our new Fairphones 2s just a couple of days ago and have been very happy with them since. But today when my partner got home she realized hers had died even though it had about a quarter of battery life left. Since then I’ve tried to simply load the battery but that would not work so i tried to switch battery between the phones but her phone still did not respond to the on/off-button. I get nothing more than the red light loading indicator when plugging it in the charger. No vibrations, no screen activity, NOTHING! The phone has not taken any hits or been in contact with water. Any thoughts on what could be causing this?
Kind regards,
Karon
Hello,
My fairphone 2 can not be started. It just show the android symbol, nothing more.
Without influence the phone became warm. In this time i diden’t use it. I cant start it now. What can i do?
Sad greetings
Henk