TCL TV 4 SERIES ROKU WON T TURN ON RED LIGHT BLINKING General Troubleshooting
| CONF | DIAGNOSIS | PART MATCH | ACTION |
|---|---|---|---|
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86%
CONF
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Power Supply Board
The blinking red light signifies that the TV is receiving standby power but cannot achieve the full 'on' state. This is most frequently caused by a failure in the Power Supply Board's ability to maintain stable secondary voltages under load, often due to degraded capacitors or a failing voltage regulator.
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CHECK PRICE |
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9%
CONF
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Main Board
If the Power Supply is verified to be outputting correct voltages, the Main Board is the next likely culprit. A failure in the SoC (System on Chip) or a corrupted eMMC boot sector will prevent the TV from completing the power-up sequence, leaving it in a blinking error state.
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CHECK PRICE |
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5%
CONF
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LED Backlight Strips
In some TCL 4-Series revisions, a short circuit in the LED backlight array can trigger the Power Supply's protection circuit (OVP/OCP), causing the TV to immediately shut down and flash the status light as an error code.
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CHECK PRICE |
DIY Repair Guide
Watch exactly how to replace the Power Supply Board.