Accessible Factory Menu allows for fine-tuning display parameters like LVDS MAP and resolution settings. Firmware and Updates Firmware for the TP.MT5522.PC821
This usually means the LVDS map in the firmware doesn't match the panel. You will need a different exclusive build tailored to your specific panel voltage (3.3V vs 5V vs 12V). Conclusion tpmt5522pc821 firmware exclusive
Updating or installing "exclusive" firmware for this board is a critical process often required when matching the board to a specific LCD panel. AliExpress.ru Firmware Compatibility: tpmt5522pc821 firmware exclusive