A: You flashed firmware from a similar but not identical device. The touch panel driver (Goodix, FocalTech) is wrong. Find the exact firmware for your hardware revision.
By following this guide, you have learned not just how to run a flashing tool, but why the Allwinner A133 requires low-level access to its storage. You are now equipped to rescue any A133-powered device that crosses your path. allwinner a133 firmware install
A: Some commercial A133 devices have a locked bootloader that only accepts signed firmware from the manufacturer. If you get a "Signature check fail" error, you cannot flash unofficial firmware. A: You flashed firmware from a similar but