[Sergey]

Well, if he shows 0v, that mean it`s not otg controller problem. So i have no idea what can it be. The only thing that i can offer is make a port on tablet and charge the battery directly with charger like imax b6. Or you can try send it back on factory if you buyed tablet in shop like gearbest or similar. They usual have 1 year warranty.

[Sergey]

You should test in usb mode, like you want to charge him.

[Sergey]

Its important, did you test in usb mode or usb otg?

[Sergey]

Check voltage on usb port when charger is disconnected. If there will be 5v, it means that otg chip is probably broken. You also can turn off the tablet, give him a rest and then try to charge.

[Author]

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