Yesterday was nagivating, when I touch the screen to activate an app, the touchscreen freeze, well I resetted the cellphone a lot of time but still stuck, and also reset to factory settings and wipe data, not working, finally hours later of search I found the issue the digitizer, is the responsible for touch reactions of the screen, located in the superior left corner, the only thing you do is press for 5 seconds in that area and the sreen working right again, I hope so this thread helps a many persons with this trouble.
If your tablet has a USB port and you have a suitable adapter then you should be able to connect a mouse and regain control. I've used this method on several occasions and at the very least you can carry out important tasks.
You may be able to attempt a reset but if the screen has failed then it will need replacing. If a reset fails and you're feeling brave then a strip down may reveal the problem.
-First of all try restarting your device by removing battery.
-Doing hard reset can resolve this issue.
-Search on internet about your device's procedure for resetting.
-If the problem doesn't get resolve then you got to consult a technician for checking hardware issues.