LG TV UP8000 WON T TURN ON RED LIGHT BLINKING General Troubleshooting
| CONF | DIAGNOSIS | PART MATCH | ACTION |
|---|---|---|---|
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85%
CONF
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Main Board (PCB Assembly)
The Main Board manages the initialization handshake; a failure in the processor or the Power Management Integrated Circuit (PMIC) prevents the board from sending the 'PWR-ON' signal to the power supply. This leads to a diagnostic loop where the red LED blinks as the system fails to complete the boot process.
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CHECK PRICE |
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10%
CONF
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Power Supply Board (EAY)
If the secondary filter capacitors or switching transformers on the PSU are degraded, they may provide standby voltage but fail to maintain the high-current rails required once the TV attempts to power the backlights, triggering a protection shutdown.
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CHECK PRICE |
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5%
CONF
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LED Backlight Strip Kit
A shorted LED diode within the panel's backlight array creates an over-current condition; the PSU detects this via the 'Error' pin and immediately reverts to standby/blink mode to protect the circuitry from further damage.
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CHECK PRICE |
DIY Repair Guide
Watch exactly how to replace the Main Board (PCB Assembly).