LG TV C1 OLED WON T TURN ON RED LIGHT BLINKING General Troubleshooting
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
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86%
CONF
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Power Supply Board (PCB Assembly)
The Power Supply Board is responsible for converting AC to the DC voltages required for the Main Board and the panel's T-CON circuitry. A failure in the electrolytic capacitors or the switching MOSFETs on this board prevents the unit from sustaining the power-on sequence, causing the protection relay to trip and the standby light to blink. Replacing the board restores the necessary voltage rails to the TV's internal components.
SKU: EAY65689423
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12%
CONF
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Main Logic Board
If the Power Supply Board is functional, the Main Board may be failing to send the 'Power_On' signal or may have a shorted processor that forces the PSU into protection mode. The blinking light can indicate a communication error between the System-on-Chip (SoC) and the power management system. Replacing the Main Board is the standard resolution when power rails are confirmed stable.
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2%
CONF
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TV Power Cord
While less common, a partially damaged or frayed power cord can cause high resistance, preventing sufficient current draw during the high-demand startup phase. This can lead to a voltage sag that triggers the TV's internal safety shutdown, manifesting as a blinking red light.
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DIY Repair Guide
Watch exactly how to replace the Power Supply Board (PCB Assembly).
// NOTICE:
This report is generated by an Agentic AI Engineer utilizing probabilistic modeling.
PartSniper is an automated parts recommender service. AI-generated results may not be correct. This data is not a substitute for professional engineering advice or manual inspection. Always verify part compatibility and disconnect power before any repair. PartSniper is not liable for inaccuracies, injury, or damage.