The last time this happened with my Hisense 32 LHD I spent money going to a service person only for them to tell me they couldn't get parts for the TV. I brought it back home and let it sit unplugged for a couple of weeks and then tried it again and it worked believe it or not. I did however have it plugged into a different outlet, but I know the outlet works because other things are plugged into it. I have a friend that experienced the same problem and he left his unplugged and the TV worked later also, he has like a 65in TV. I think they need to be on surge protectors.
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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/ http://electro-medical.blogspot.com/
Blinking codes details of many popular brand TVs are given. Surf the site with patience.
First check your circuit breakers. Also,If you are capable, open the TV and check the fuse inside. The power outage and the sudden spike in power might have tripped the breaker or blown the fuse. Good luck!
Power supply board is dying not giving the tv correct voltage anymore.The power supply board,that the board power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.
I had a similar problem when there was a power outage or the lights went briefly out. I unplugged the TV and left it for a few days/weeks and then plugged it in and the TV worked. I think newer TVs should be treated like a home computer and put them on surge protectors.
I have the 52" version of the Viera model. Mine went out last night and started blinking twice over and over again. I suspected overheating so i just went to bed and tried it in the morning with no luck. Then I unplugged it for more than ten minutes and plugged it back in and everything worked fine. I hope this helps.