This set was perfect when the house circuit braker switched the power of the whole house the power was restored and the tv switched on green light on but no picture and no sound the tv can be seen that is on and cannot be switched off to standby
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You may wish to try the unit in a different electrical outlet in another part of the house to ensure that the house's electrical breaker did not trip for that particular circuit. You can also test the wall socket with a voltmeter if you have one or you can just use a standard plug in reading lamp to confirm that you have power at the outlet.
If you do not have good power at the outlet, then you may just need to reset the breaker for that circuit at the house's main electrical panel.
If you do have good power at the plug, then it may just be a blown fuse in your TV. Many of these TV's have a small fuse holder built right into the rear plastic cover right where the power cable enters the enclosure which can be easily accessed without having to open up the whole TV enclosure. Just unplug the power to the set and gently pop open the little fuse holder cover to reveal the fuse inside. Here is a link to an image of a common type:
Just use your mouse to click on the link, which is the underlined and highlighted text just above. This will open a new web browser page automatically for you and allow you to view the information and items at the website indicated.
Then just check the fuse for continuity with a multimeter to see if it is bad. Replace it with a brand new one of equal value if necessary.
If your set does not have an external fuse, then you may have an internal power supply circuit board problem which will require some disassembly of the TV enclosure in order to access and troubleshoot.
Before you attempt any kind of disassembly or home repair, you should actually check with your retailer where you purchased the item about any possibility of a warranty return or exchange. If the warranty is already expired then you have nothing to lose by opening it up and having a look, assuming of course that you have at least some basic electrical safety knowledge and that you follow all the necessary precautions.
Tries tv unplug,replug it back like about an hour later.See,if the tv will resetting self and working again.Not.The tv power supply board it is the causes and the problems.That the board where the tv power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish tv power supply board for the replacement.
Write a letter of complaint to LG. They are a caring company and I am sure will corespond quickly. Make copies of the corespondence from your service company and enclose the copies along with phone message dates and times. Hope you resolve your situation quickly.
There no lamp in the LCD tv only CCFO floorescent light tubes.U can't reset or adjust those CCFO floorescent light tubes.Those CCFO floorescent light tubes are design to work as a whole LCD screen for the tv that it.The tv power supply board is dead.That the board where the power a/c cord plug into it.That the power supply board,it dead.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.On the board u said u see flashing blue light,searches all around for those dead leakages capacitors,they alway bulges up on it tops or puff up on it tops.Replaced those dead capacitors or replaced the whole board.This actions will get the tv power stable again and work.
1) Try with a different surge protector. The oine you're using could have a short-circuit
2) Try without a surge suppressor, at least for a day
3) Does the circuit breaker trip when something else starts running? Your microwave, fridge, dishwasher, etc.?
4) Check the user's manual of your TV, under SPECIFICATIONS. Check for "POWER REQUIREMENTS". If the power requirements listed is greater than 15 Amps or 1,700 Watts (assuming you live in the USA and your household is 110-120V), then the circuit breaker will almost always be triggered by the TV. Most circuit breakers inside a house are 15 Amps.
The only option you have is to replace the circuit breaker for one that has more Amps, but doing so on your own without having and electrican check if the wiring will hold the extra load is extremely unadvaisable. You may end up with an electric fire in your hands.
Very likely a power supply problem.
Most modern sets monitor power supply performance continuously and if a higher drain circuit is drawing excessive juice, they are designed to shut down to avoid burning down your house.
After all, no house, no new TV needed -
I would be sniffing around the top vents on the set to detect possible 'hot' odors coming from it.