LCD driver board, we do in the test found that electricity and pull out of the screen plug HDMI will cost random display screen

Flowers screen test VGL above the LCD screen and VGH no voltage, we only have power supply and signal lines to the screen, screen their booster, is auo original screen
We have tried to keep 3.3 V only fault signal of liquid crystal screen will appear, this is how to control the sequence of, difficult to signal can control of the VGL and VGH voltage switch of LCD/
Have met a great god

LCD screens are defined as follows

CodePudding user response:

Check the screen flash and F/W

CodePudding user response:

This screen flower screen reasons have been found, the picture in the white picture, do not have this problem in a black screen, the LCD panel bias current more than 10 ma, beating will cause screen, bias circuit protection does not work,