The assembly PCB main (BN94-18149R) is an integral component of your Samsung television's operation. If your television is experiencing issues such as no power, unexpected shutdowns, or failure to start, this part might be the cause. Designed specifically for Samsung TVs, it is a genuine part tailored for models like the QN55QN85CDFXZA. This assembly ensures seamless communication between various components of your TV, maintaining its functionality. Before purchasing, verify your device model number for compatibility.