I bought my granddaughter a Zeepad 7.0 aka Wopad-Kids7. Operating system Android KitKat 4.4. I guess that's the right info needed. I followed the initial charging directions and it seemed to work great...for about 15 minutes. The screen then went black (I thought she may have turned it off by accident) and it would not turn back on. It flashed the logo for approx. a half a second when I pushed the on button but then just went black again. I didn't try anything further and when I picked it up the next morning (did not put on charger) it came back on and showed the battery picture so I charged it per instructions. Once again after about 15 minutes same thing with black screen and will not turn on again. Any help?