Affected by power surge 
As there are 2 completely different circuits for sound and picture in a tv set it is possible that the picture board has been damaged by the power surge . it could be as simple as a blown fuse for that board or you may have to take it to a repair shop for a proper diagnosis and a quote
SOURCE: lamp going out on jvc flat screen tv 52 inch,how do you change
Versed, you have to open the back panel (cover) to access the lamp. replacing is easy as soon as you can see it. loosen the mounting bolt and pull to unplug the lamp from the SMPS Lamp power supply. Thats it.
SOURCE: IHave a 32 inch flat screen Westinghouse TV that c...
Ur tv the LCD inverter board it dead.The LCD inverter is the board that help the LCD screen panel to get a backlight to produce a picture,the LCD inverter board is dead and it not working anymore that why u only get 8 sec.of the picture.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish LCD inverter board for the replacement.It a long board in shape.
SOURCE: tv keeps turning on and off
You probably have blown capacitors on the PSB-power supply board. Recaping with new UF caps works 90% of the time. The set turns itself of into a fault protection to keep from damaging more components internally. A few bucks a soldering iron some solder should do the trick.
SOURCE: 42 " flat screen Sanyo. no picture no sound, power yes!
The main board should be checked. For more details Type in this site name < Electro-help> (DO
NOT copy and paste the site name from here.
Doing so may lead you to wrong place) to search box of your search
engine [not in the address bar of your browser],
and press "Enter".
It is an electronic
equipments service help site. Note the
position of hyphen in between words in site name. The site will appear as it is in
web; subtitled as Service help to electronic home entertainment equipments.
Pull up older posts.
You can locate this site,
either at the bottom part of first search page, or at the top of second. Detailed descriptions are there to help you. Check the associated ads related to electronic spare parts. You might get details about the availability and price.
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