The device may not charge if the charger is not properly connected, the charger or cord is not working, or the device’s micro usb board is not working. For diagnosis and repair guides see the following link. Link

First, make sure your device is charged. If your tablet is fully charged, then it may be that the screen is not working because the display screen is damaged, the touch screen is damaged or the tablet may be frozen. For diagnosis and repair guides see the following link.Link