Chosen Solution
It buzzes, shows samsung 4 logo, stay on that screen for a bit, goes black, then starts the process over. The battery is fully charged.
Your phone is stuck in a bootloop and something is causing it to be in a bootloop. I would start with replacing the battery, sometimes even overcharging a battery can cause this. If that does’t fix it then you may have to reflash the OS on the device.
What does mean and how to reflash the OS on the device?
