Will not charge or power on

You troubleshoot your tablet like this. No power or charge. Start with cable and outlet to make sure that it's not a bad charging cable. Next you go to charging port and on/off power button. Check if you see damage to the charing port and next you test out on/off power button which may require you to open the case of the tablet. If all those passed you're troubleshooting test, then you start with the logic board. But at this point it start to get technical and requires special equipment to further test your tablet.