When this happens, what we see most often is either the 512 is not getting an adequate charge or the power button has gotten stuck . To ensure efficient charging, make sure you use a 1000mA charger or higher to charge your 512.
If the power button is stuck in a depressed position, try tinkering with the power button to see if you can get it to pop back out and into place. If you can, then be sure to charge the device afterwards. While the button is stuck it will drain the battery of the 512.
If the power button is stuck in a depressed position, try tinkering with the power button to see if you can get it to pop back out and into place. If you can, then be sure to charge the device afterwards. While the button is stuck it will drain the battery of the 512.
