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Several common faults of LCD display driver board
2025.09.24
Common faults of LCD display driver board:
1: Initialize the startup settings screen of the LCD display after booting up.
2: Detecting input video signal, if no signal is detected, it will prompt "no signal input", or if the resolution is abnormal, it will prompt "out of frequency range", etc.
3: In response to key commands, modify the register values according to the commands we press, and then store the modified values in eeprom. For example, if we adjust the appropriate brightness, we won't have to adjust it every time we turn on the computer in the future.
(For example, faults such as button failure, unresponsive when pressing+- menu auto, etc., usually work fine when flashing the program. There are also many faults where the screen color is abnormal because the data in the EEPROM is damaged. We just need to restore the factory settings, and the MCU will save the settings back to EEPROM to solve the problem.).
4: In response to the power button, if it is currently in the power on state, pressing the power button will turn it off. If it is currently in the power off state, pressing the power button will turn it on.
