Hi there. I would advise you to unplug your tv from the wall. Wait approximately 5 minutes. Hold down the power button on the tv for 15 seconds without the tv plugged in. This is what they call power cycling. If plugging back in the tv does not work; you might have a power board issue. A typical power board/circuit board repair runs from $25 to $125.
SOURCE: tv stand by red light flashes twice continuosly
This unit is having a problem with component failure and is going into the protection mode. This protects the unit from further damage. You will have to take or send your television in for testing and service.The service center will have all the service information to analyze the problem and do the repairs. If you had given the brand name and model number of the television, i could have directed you to a customer support website or telephone number. This information can be found in your owners manual. I hope this information helps you with your problem.
Hi,
Try to change the capacitors first. Normally lost of lcd tv have problems with the capacitors and which lead to powers problems. May you will not find visually that the capacitor is fault. So go for changing the capacitor also check the following video. Which will help you understand how to check the power supply broad. Also take care while working with the power board there is a risk or electric shock Also one of the capacitor in the power supply holds charge even when you have remove the power supply.
Testing LCD TV Power Supply BoardsSTEP BY STEP
www.electro-medical.blogspot.com
Those blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://electro-medical.blogspot.com/
If blinks continue without any pause, the main board is faulty.
SOURCE: lg tv blink codes
Take the screen off connect power and watch LEDs if any don't flash its LEDs only needed to change faulty strip if they all flash its probably t con boards.
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