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More than likely it is the TV power board that has went bad..if u plug it up no light or stand by and doesn't power up..power board is bad..but you can find online or eBay ..search for power board for your make and model there usually very cheap..and it's a quick and easy fix ..don't take no time ..certainly cheaper than new TV..goodluck
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. Viewing it in "Mosaic" or "Magazine" will make surf easy. http://electronicshelponline.blogspot.com/
Blinking codes details to many popular brand TVs are given. Surf the site with patience.
It sounds like your picture tube has went out. If you have one tube that is bad it will cause your TV not to come on. This is a safety feature. How old is your unit. Try disconnecting everything from your TV. Unplug your TV and let it sit for at least 8 hours. This will discharge your picture tube. As long as it is plugged in you have constant current. After waiting this period plug it back in and tell me what you hear if the picture does not come on. Now keep in mind that when your TV comes on you might only see your picture for seconds before it shuts off again or goes into your stand by again. Try this also, go to your internet browser and type in your brand, model, help with stand by. If you can't find what you need try this link http://emersontv.com/. Hope this helps. JimmyC