Try a hard reset. Typically done by holding the power button for about 20 seconds. Some tablets may have a small hole which will require a paper clip, located on the back of the device. If resetting doesn't work you will probably need to factory reset the tablet. Typical procedure.
Power off the tablet completely
Tap, then immediately press and hold Power + Vol down (Some will use Vol Up) until you get a menu
Use the volume buttons to navigate the menu to the factory reset option.
Use the power button to select the option. (This will wipe out all data)
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Try a hard reset. Typically done by holding the power button for about 20 seconds. Some tablets may have a small hole which will require a paper clip, located on the back of the device. If resetting doesn't work you will probably need to factory reset the tablet. Typical procedure.
- Power off the tablet completely
- Tap, then immediately press and hold Power + Vol down (Some will use Vol Up) until you get a menu
- Use the volume buttons to navigate the menu to the factory reset option.
- Use the power button to select the option. (This will wipe out all data)