LG C1 OLED Wont Turn On Red Light

Power Supply Board (PSU)

The PSU in the C1 series often experiences thermal fatigue on the MOSFET transistors and DC-DC conversion capacitors. These components fail to maintain the stable high-current output required for the OLED panel's startup sequence, causing the system to trip into a protection loop. Replacing the board restores the primary power rails and the relay switching mechanism responsible for transitioning from standby to active state.

SKU: EAY65689423

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Main Logic Board

If the Power Supply Board is healthy, the failure may lie in the Main Board's inability to send the 'PS-ON' (Power Supply On) signal to the relay. This occurs when the system-on-chip (SoC) fails its internal boot-up check or when the communication bus between the remote receiver and the processor is interrupted.

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T-Con (Timing Controller) Board

In some OLED architectures, a short circuit on the T-Con board or the connected ribbon cables can pull down the PSU voltage rails instantly upon startup. This forces the power board to shut down as a safety precaution to prevent damage to the organic LED panel layers.

SKU: AGF30252101

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