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This genuine BN44-00754A (also marked L40G0B-ESM / PSLF870G06A) power supply board is the exact OEM replacement for Samsung 40-inch LED TVs including UN40H4200AGXZD, UN40H4005A, UN40H5103A and HG40ND series. It integrates AC-DC conversion and LED backlight drive in one compact PCB, delivering stable multi-voltage outputs (5V, 12V, 24V) to the mainboard and panel.