Because these boards are generic (OEM), the exact firmware depends on the TV panel model (e.g., a 55-inch JVC curve vs. a 50-inch Hyundai). Official Sources:
Software corruption can disable the audio IC processing or block HDMI/AV signal detection. Step-by-Step USB Installation Guide P150-638v6.0 Firmware
If the screen appears distorted, you may have installed firmware for the wrong screen resolution or panel type. Because these boards are generic (OEM), the exact
