Have you tried plugging it in to make sure it is charged? Also, if the device got to low (0%) before being plugged in, it will sometimes not actually charge correctly. Try pressing the power button for 20 seconds, then plug in the device and see if it charges.
If you get nothing still, I would check your cord. Plug it into a different device and see if it works for it. If it does great. If it doesn't you need to replace it.
There is a reset on the device. I can't say where it will be as they are different for different devices, however you should be able to find it on the devices exterior or in any place accessed by SD and SIM cards. It will be a small pinhole that you can use a pen in to reset the device.
NOTE: Before opening up the...