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Unfortunately modern televisions and monitors are full of electronic semiconductors of which many are likely have got destroyed along with your original power supply during the storm. A nearby lightning strike will send high voltage spikes down aerial cables as well as through socket outlets. If you have contents insurance you should be able to claim for a new monitor.
lightning can do extensive damage to electronics equipment especially flat panel TV's. I would really recommend a professional diagnosis instead of board swapping. You could have several boards that are damaged!
That problem is usually have 2 causes..Its either power supply board or main board..
Please take this steps on how to determine the problem: 1. Open the back cover. 2. Check the power supply output...It should have 5vdc for the main board..12vdc or 16vdc for the audio and 24vdc for the back-light inverter.. 3. If those 3 voltage supplies have encountered voltage drop...The problem could be on power supply board.. 4. If the power supply output is normal..The problem could be on the main board... 5. If the problem is power supply you should check if the capacitors are bulged on the top and try to replaced it..If you can't do that you can purchased new power supply board.. 6. If the problem is on main board there is no D.I.Y repair on that so you need to buy a new main board that fits to your TV.. Hope this solution will be helpful..
The tv power supply board it is dead,u said had an electrical storm in ur area before this problems happen.Yes.Than the tv have a power surge by of the electrical storm already,the storm had a charge sent of an electrical magnatic statics to ur tv and now kills all those sensitive ICS on ur tv power suppply board already.The tv power supply board already dead that the board where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish power supply board for the replacement.