SAMSUNG (UA43M5570AUMXL ) MOTHERBOARD

The Samsung UA40D5000PM motherboard (main board), typically identified by part numbers BN94‑05221Q, BN94‑05221W, or BN94‑04470M, is the central control unit for Samsung’s 40″ Series 5 Full HD LED TV (model UA40D5000PM). It houses the HyperReal Engine and Clear Motion Rate 100 chipset to enhance picture clarity, color reproduction, and smoother motion; supports Dolby Digital Plus and SRS TheatreSound audio processing; and provides comprehensive connectivity with 4× HDMI 1.4 ports, 2× USB ports, component/composite inputs, PC VGA and audio input, Ethernet, optical digital audio out, and an RF tuner for multi-system reception (PAL/NTSC/SECAM). As the key interface between external devices, firmware, processing modules, and internal boards (T‑Con, power, LED driver), this OEM board is essential for restoring full AV functionality in case of failures such as no power, no signal, or port malfunction. A pre‑tested used unit (pulled from a working TV) typically sells for around USD 120 and comes with a limited warranty .

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.