I've got a new Galaxy Note 2 that is about 15 days old. So far I've had no problems. Today I went to use it and the screen was black and the blue notification light was flashing. I tried holding the power button but it wouldn't do anything. I didn't attempt a factory reset because I didn't want to lose data. I removed the battery and re-installed and everything works as it should. Is this something I should be concerned about? I searched the forum and only found one where the notification light was red so I'm not sure of the significance.