What to do if the screen image looks abnormal on LG 55UM3DF?
- YysmithAug 31, 2025
If the screen image on your LG Digital Signage looks abnormal, check if the graphics card resolution and frequency are supported by the product. If the frequency is out of range, set to the recommended resolution in the 'Display' settings in Control Panel. Ensure that the correct input signal is connected to the signal port.










