SAMSUNG LED TV POWER SUPPLY BOARD MODEL NUMBER UA50DUE70BKLXL The Samsung TV model number UA50DUE70BKLXL uses a specific power supply board that can typically be identified by a BN44-xxxxxxA/B part number printed on the board itself. This board converts the AC power into the various regulated DC voltages needed for the TV's internal components, such as the main board and LED backlights. Key Details Function: The power supply unit (PSU), or Switched-Mode Power Supply (SMPS), is responsible for managing and distributing power throughout the TV. Identification: The exact part number (e.g., BN44-00807A, BN44-00932A) is crucial for finding a correct replacement. The generic model number alone is often insufficient for purchasing the correct component. You will need to open the back of the TV to check the number printed on a white sticker or directly on the board. Common Symptoms of a Faulty Board: TV does not turn on (no power). The standby light is lit, but the TV will not power on. Clicking sounds from the TV when trying to power it on. Backlight issues or the TV suddenly shutting down.