Is your Samsung 51-inch plasma HDTV not functioning properly? The main board might be the culprit. The BN94-04777A PCB assembly-main is a genuine part designed to replace a failing main board in your TV. A faulty main board can cause various issues, such as no power, no sound, or display problems. Replacing it with this genuine Samsung part can restore your TV's performance. Make sure to check your model number to confirm compatibility before purchasing.