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://electronicshelponline.blogspot.com/
https://homenol.blogspot.com/
https://elektrotricks.blogspot.com/
Blinking codes details to many popular brand TVs are given. If blinks continue without any pause, the main board is faulty. Search the sites by type in the brand name to your set, in its search box on the right side. View it on a desktop or in WebView.. Mobile view has no search box.
Probable power supply failure
SOURCE: Power LED blinks red
it is a bad fan. it also could be a power supply. Quite often the real problem is dirt clogging up the fan(s) to the point that they need to be replaced. Operation of the set in a dirty environment is not a good idea
SOURCE: I have an Emerson TV 32
i turned on my tv and it blinks green continuesly. it wont turn off to red light. i unpluged it for 30 min. repluged it and green light comes on and wont stop blinking
SOURCE: Sony KDS-60A2000 projection TV: power led blinks 4 times
the projector bulb has gone out you need to replace it.
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Hi, this is main board failure and you will need to replace this vital board. you power board is fine but, it is unable to send a proper current through the main mother board due to the damage at hand.
SOURCE: 42PF7321D/37 LED Light Blinking RED
my dad had this happen too. after some research, we found out that there are two capacitors on the power supply board right next to the connector for the main logic board that went bad. you can just pull those out and solder in new ones, and it works like new again! i found a repair kit on ebay for $35 including shipping, and that's all it took!
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