Your TV's power issues might be due to a failing power supply. The Samsung Power Supply/LED Board (BN44-00932B) could be the solution to power inconsistencies or screen flickering in your 4K UHD Smart TV. It's a genuine part specifically for Samsung televisions like your 58-inch Class Smart 4K UHD TV or 55-inch UHD 4K Curved Smart TV. Verify your device's model number for compatibility before purchasing.