Turn it on. Power light just indicates that the tv set is receiving power. try to manually power on the tv from the button provided on the tv bottom or sides
These 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://electronicshelponline.blogspot.com/
Blinking codes details of many popular brand TVs are given. Surf the site with patience. If blinks continue without any pause, the main board is faulty.
Y board affects individual display lines, x board affects all of them.
SOURCE: I need a schematic diagram for an LG 42 TV Service Code 42LD450-UA.CUSWLO
If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/
Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
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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Hi Justin Woodrow, I want to help you with your question, but I need more information from you. Can you please add details in the comment box? Like do you have sound? Is your stand by light flashing when the TV off. Is the TV clicking sound?
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