repeatedly (about 10 times) until the computer recognizes the device. If prompted for a "Mandatory Format," select to wipe the device and install the fresh Android OS. , or are you trying to to a newer version of Android? How to Find and download Firmware file for chinese tablets
A progress bar will appear. Do not disconnect the tablet until you see a success message. The first boot after flashing can take up to 10 minutes. sanei a76 tablet android flash download portable