Main Circuit Component IdentificationMain Motherboard (Detached, Top): This handles input signals (HDMI, USB), video processing, smart features, and sound. It must align perfectly with the inputs on the side of the chassis during reassembly.T-CON Board (Mounted, Right Side): This translates the video signal from the main board into precise row/column timing instructions for the LCD pixel array. It is connected via two flat white ribbon cables. Key Troubleshooting & Repair ActionsClean Ribbon Connections: Disconnect the flat white ribbon cables by gently lifting the black locking flaps on the connectors. Inspect the metal pins for carbon buildup or oxidation, clean them gently with an anti-static solution or isopropyl alcohol, and reseat them firmly.