The Sony KLV-40BX400 motherboard is a key component in the 40-inch Full HD LCD TV, handling all core functions including signal processing, video rendering, audio output, and input management. Built to support 1080p resolution, this board works seamlessly with Sony’s proprietary firmware and delivers crisp, stable visuals and sound.

While this is not a smart TV board, it includes HDMI, VGA, and USB ports, allowing media playback from external devices. Designed for non-LED CCFL-backlit panels, it is a durable and reliable board for repairs and replacements in the Bravia BX400 series.