When your Samsung QLED 4K Smart TV displays unexpected behavior, such as failure to power on or irregular display issues, the main board might be the culprit. The assembly PCB main board (BN94-00060L) is a genuine Samsung part tailored for various models like the 60-inch, 55-inch, and 43-inch Q60A QLED 4K Smart TVs. It's crucial to address these symptoms to restore your viewing experience. Before purchasing, check your device's model number to confirm compatibility.