Try a hard reset to this set, and check. If it do not help you, the main board to this set is faulty. There are two types of reset to TVs. The first is simple to do; a Hard Reset; and the other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight; will be better. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. 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/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.
SOURCE: Screen went black
I am working on one right now with a similiar problem. The power supply is bad in the one I am working on, and sadly, the part is not made anymore. I hope you have better luck than I am finding the bad component in yours. Sorry for the negitive answer.
Ed
NC Electronic
Mills, Wyoming
SOURCE: TV WILL NOT TURN ON
The power supply, and or one of the circuit board is defective. The set will require shop service.
Jerry G.
SOURCE: can not turn on television, light just blinks.
The blinking is an error code. If the TV is new return it. If not call a tech to come work on it they will have all the codes and explanations.
SOURCE: television turns on and immediately turns off
it costs $2.50 to fix its 2 capacitors in the motherboard need to change them very easy i just fixed mine took me an hour all together and less then 3 bucks .if you open the tv look in the middle motherboard and you will see witch capacitors are blown because the top of them is raised up change them and ure done,all the capacitors have a cross scored in the top ,so they dont blowup ,so if you see 1 raised just a little bit its fried change it while ure in there , they wanted $400 to $500 to fix lmao now .
SOURCE: My Olevia 27in. LCD Television does not turn on
Well, at least the standby 5vdc circuit is still working but the problem can be in the controller board is not sending the signal to turn on the main power supply sections, or the power supply itself is bad. Look at the power supply first for burnt parts, bad capacitors.
http://en.wikipedia.org/wiki/Capacitor_plague
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