The most common method for a "force-flash" is using PhoenixSuit in , which allows you to bypass software errors:
Q: What devices are affected by the Allwinner A133 firmware update? A: The update affects devices powered by the Allwinner A133 SoC, including tablets, TV boxes, and other Android-based devices. allwinner a133 firmware updated
Connect the device while holding the "Reset" or "Volume" button to enter recovery/flash mode. The most common method for a "force-flash" is