I have samsung note 5 and its pen not working on screen properly. Left side seems more defective? Smart select also not working. I have case with magnet which i removed last month. What could be the reason? plz help i am not able to write om screen.
Dial *#0*# which should pop you into service mode. Here you can test screen hardware.
Personally I don't much like magnetic covers...
Sounds like your phone needs to be repaired now.