If your Samsung LED TV model UN55J620DAF isn't functioning as it should, the main PCB assembly might be at fault. This genuine Samsung part, BN94-09584A, is an important component of your television. A faulty main board can result in various display issues, such as no picture, poor video quality, or intermittent screen flickering. Replacing this part can help restore your TV's performance. Make sure to confirm your TV's model number is correct before buying.