The TV turns on, and you can hear the audio, but the screen remains black (though the backlight may be visible).
Video only appearing on half or a quarter of the screen.
Images that appear to move in slow motion or leave "trails".
If you are looking for a for repair or technical specifications, this guide provides a comprehensive overview of its function, common failures, and essential voltage test points. Technical Overview and Known Models
Note: Horizontal lines are typically a sign of a defective LCD panel rather than a bad T-CON board. Voltage Test Points for Repair
If you are troubleshooting with a multimeter, checking these standard T-CON voltages is the first step in diagnosing a faulty MDK336V-0N: Expected Voltage Symptoms if Missing No display; backlight is on VDD / Vlogic White display or digital noise VGH (VON) 20V to 30V Slow motion or ghosting images VGL (VOFF) -5V to -10V White screen or lack of contrast AVDD 15V to 17V White display or vertical color lines VCOM Negative or washed-out picture How to Find the Schematic or PDF