My phone was constantly rebooting itself. Every time I would plug in the charger it would restart. Then it went completely dead. I can't get it to turn on and when I try, it will vibrate 7 times.When I press the power button and or/ plug in the charger it just vibrates. I left it on the charger when I went to bed and then when I woke up it was like this. What does this mean and how can I fix it?