Hello I have a LG 55in TV that will not power on, I’ve tried the rest procedure and it still acting up. I’ve notice that the Red standby light is not on. And when I attempt when I tap the power button it will light up and then turn off, I can hear something in the tv click off. The Model number is 55LW5300-UC
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Here's an image of the Power-up boot check troubleshooting flowchart from the service manual that may help.
(click on image)
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Oh no, it sounds like a hassle with your LG TV! Firstly, check the power source, make sure the outlet is good, and the cord isn't damaged. Try a different outlet and do a power cycle - unplug for 10-15 mins, then plug and retry. Ensure your remote has good batteries, and also try the TV's power button.
If it persists, check for physical damage and consider a factory reset. If all else fails, contact LG support, especially if it's under warranty. If not, a professional technician may be needed. Be cautious with internals unless you're savvy. Good luck!
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I tried and Check all what you said. I need a service manual with a wire diagram so I can test the circuit boards and internal connections
The service manual was linked in my answer above.
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