| Component | Description |
|---|---|
| Main Processor (CPU) | The central processing unit (CPU) manages all digital processing tasks, including video decoding, signal processing, and handling user input. |
| Power Supply Circuit | Converts AC power from the wall to the required DC voltage for the motherboard and other components. It also manages power regulation and distribution. |
| Memory (RAM/ROM) | RAM stores temporary data (like settings, active processes). ROM stores firmware (TV operating system, boot data). |
| T-Con Board | The timing control board (T-Con) is responsible for controlling the LCD panel’s operation, such as converting digital signals to analog and controlling the pixels. |
| Audio Processor | Processes the audio signals, handles sound output, and often works with speakers or external sound systems. |
| Video Processor (GPU) | Handles video decoding, upscaling, and any necessary processing for image quality enhancement. |
| Input/Output Ports | Includes HDMI, USB, AV inputs/outputs for connecting external devices like game consoles, external storage, etc. |
| Wi-Fi Module | If the TV has smart functionality, the Wi-Fi module enables wireless internet connectivity for apps and streaming. |
| Backlight Driver | Controls the LED backlight for the TV screen. It adjusts brightness levels and manages power to the LEDs. |
| IR Receiver | The infrared (IR) receiver accepts signals from the remote control. |
| GPIO (General Purpose Input/Output) | Allows communication between the motherboard and external devices like sensors, buttons, or other peripheral components. |
| Heat Sink/Fan | Prevents overheating of the processor and power supply components by dissipating heat. |
| Power Button & LED Indicators | The button for powering the TV on/off and LED indicators for status (e.g., standby, power on). |
The LG 43LH576T-TD motherboard (typically marked as EAX66883503 or EAX66883504) is the primary control board for the LG 43-inch Full HD Smart LED TV. It manages all critical TV functions including video and audio processing, input/output control, and smart features powered by LG’s NetCast or early webOS platform. Supporting a 1920×1080 resolution, it delivers clear picture quality and smooth performance, with integrated support for Dolby Digital sound, Virtual Surround, and Clear Voice technologies. The board includes 2 HDMI ports, 1 USB port, AV input, RF input, LAN port, built-in Wi-Fi, and optical digital audio out, enabling versatile connectivity and access to online content like YouTube and Netflix. As the central unit linking the panel, power supply, and firmware, this motherboard is essential for the TV’s smart and multimedia capabilities, and is commonly replaced in cases of no power, signal failure, or HDMI issues.
VU (32 K160M) MOTHERBOARD 







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