This internal backlight cable is designed for TCL 55S431 & TCL 55S21 models and is compatible with the brand and model specifications. The cable runs from the power supply to the LED strips, ensuring a reliable connection for a high-quality viewing experience. This cable is an essential part of your TV's function, allowing for the proper distribution of power to the LED strips. It is a great replacement option if your current cable is damaged or not functioning properly. Upgrade your TV's performance with this TCL 55S431 & 55S21 internal backlight cable.