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We can't predict what might have been happened during a lightning strike. If the TV is dead now; the main power supply regulator board [SMPS] board is fault. If so, you have to replace it first. then only we can get information about the condition of the main board. If the TV was connected to external Ariel or cable; before the lightning stroke; the possibility to damage to the main board too is there upto 80%.
In fact, if both of this boards are damaged, it might cost around 2/3rd of the total cost of a new TV.
The decision left to you. Do whatever you want.
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Could be your household insurance would cover the damage.
Unless the lightning strike was very local to you, on your side of the local substation, the responsibility for the cost of repair or replacement could be the power company's.
Surges from lightning strikes aren't supposed to get past the electrical substation.
Old-fashioned valve tvs and radios sometimes survived huge surges on the powerline and even minor lightning strikes to the antenna but solid state semi-conductors and micro chips aren't very tolerant to overloads of any sort. These days a tv is not longer a tv in the conventional sense but like cars and radios should be considered as just another computer that is full of CMOS chips which are extremely sensitive to overloads and static discharges. Even the screen of your tv is made up of semi-conductors.
I would be very surprised if the set isn't a write-off.
Nobody can predict, what might have been happened to your TV after a lightning strike. Do you thing anybody can? Is any technician have a super-natural power to predict the faults that might have been happened due to lightning (More than 10 Million volts to start on stroke) ? Can you?
Contact the authorized service center. OK? http://electronicshelponline.blogspot.com/
Lightning-damaged electronics are a gamble to repair. Sometimes the problem is a single component, but more often multiple components are damaged, and even if you get it working, something else may die shortly thereafter. If you are lucky, only one board was damaged. My recommendation, if you have homeowner's or renter's insurance, is to put in a claim for the TV and get it replaced.
Having put forth that caveat, the blinking red LED hints that you may have enough left of the set for it to be repairable, especially given that much of a plasma set is already built to cope with high voltages. Try downloading a service manual and following the troubleshooting procedure. Here's the link (it's a Hungarian site, but there's enough English available to find things): Service manual eprom result list ElektroTanya Service manuals and repair...
The first parst affected by the lightning strike are the reservoir capacitor, a big cylindrical component in the high voltage section of the tv, which normally blows up, opening the top cap, and the NTC. Please, check these components and replace the damaged ones.
Now,the tv turn on,the front of LCD screen panel the power LED light is blinking or no power LED light indication nothing at all?Yes.The tv power supply board have problems,it dead.That the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.
If its after a lightning storm, it really could be anything. Your mainboard could quite possibly be shot. In fact almost anything in the TV could be damaged by a big surge. It could even be that your backlights went out from the surge too.
Does your power LED come on? What is it connected to? Directly to the power board or is it connected to the mainboard? If you have current through all the circuit boards, you may have a burnt tuner or chip on the mainboard.
Might not be worth fixing depending on the size/model. If its a big LCD, you could probably get a good deal on a working one of the same size with a broken LCD panel (~$100). Then you can just replace the broken LCD panel with yours and you have a fixed TV.
you can look for the model and brand, look for it on the internet and see if you can have the schematic diagram, you're lucky if u can. Lightning will strike first the tuner side, if there is a red blink, the primary side may be okay in switching type regulator, just replacing the charred part may not solve the problem. look for shorted components on the secondary of the power section.