If you can access the system, try to back up your current ROM using TWRP or a similar recovery tool.
If you manage to locate the firmware file, the standard procedure for these boards is:
Practical steps for finding "zl782-mb-v2.1" firmware
Because these tablets are produced by various minor manufacturers, finding a reliable firmware download is difficult, and there is no single official "review" for the firmware itself. Instead, users typically seek this firmware to fix software issues like "stuck on logo" boot loops or to restore a bricked device. Critical Risks & Considerations Version Sensitivity: You must match the motherboard version (
