Replace the Television Power Supply Board

Safety Warning: TVs contain high-voltage capacitors that can hold a dangerous electrical charge even when unplugged. If you are not experienced with high-voltage electronics, seek professional repair services. If the TV is under warranty, contact the manufacturer to avoid voiding it.

1. Disconnect the TV from the wall outlet and wait at least 30 minutes to allow capacitors to discharge.
2. Place the TV face-down on a soft, non-abrasive surface and remove the rear chassis screws to access the internal components.
3. Locate the power supply board, which is typically the board connected directly to the AC power input cord.
4. Inspect the board for signs of degraded capacitors, such as bulging tops, leaking electrolyte, or scorched circuitry.
5. Disconnect all ribbon cables and wiring harnesses attached to the failed board, noting their positions for reinstallation.
6. Unscrew the mounting hardware securing the board to the chassis and remove the damaged unit.
7. Install the exact manufacturer-compatible replacement power board, securing it with the original mounting screws.
8. Reconnect all wiring harnesses and ribbon cables, ensuring they are firmly seated in their connectors.
9. Reattach the rear chassis cover and secure it with the screws.
10. Plug the TV into a wall outlet and press the physical power button to verify that the unit powers on without clicking or blinking LED error codes.

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