My phone is out warranty now. been 14 months since i bought the my htc desire 820. Last Saturday i updated to marshmallow and after a few minutes it stopped working. I tried charging it but only the LED blinks and the phone doesnt turn on. I showed at the htc service center and they told me my pcb has been damaged and that it would cost 70%(around 15K) of the original cost of phone. What should I do? Any suggestions please?