iPhone – Ipad does not start

I have Ipad Air Wifi and I am not starting to fully charge it. The full reset was tested, it was connected to the PC with DFU but the screen is not displayed and the restoration fails.

Yesterday, I tried to start the ipad, I showed the empty battery icon. so I plugged in charge. It was loaded and started, but after loading up to 20%, it was turned off and not started. I tried to connect to iTunes in DFU mode. But even so no screen is turned on or close. Help.
You can not take them to the service centers, because they can charge much more than they cost.