Avoid “universal firmware” websites. They often distribute malware or incorrect binaries.
Look for filenames containing:
platform. These updates are critical for maintaining the TV’s smart features and overall system stability. System Stability 40ms801amac2hg firmware top
Open the back of the unit and find the sticker on the LCD panel (e.g., V400HJ6-PE1). The firmware must support this specific panel logic. Avoid “universal firmware” websites