Ever since the nougat update I have noticed that if you have both the sound turned down and vibration off that the LED will not blink when you get a notification. Since before the nougat updated I have always has my stock Email app notification sound on Silent and Vibration off, but when I would get an email, I would always still get the blinking blue LED. Well since the Nougat update that is no longer the case. I have done everything including factory resetting my phone. Is this a known bug, or is this just now the standard Android behavior with Nougat? If I leave the Email Notification Sound on Silent, but turn Vibrate ON, then the LED will blink.