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Hi, I have a LG 42LC46 TV which is two & half years old. About ten minutes after switch on the picture statrs to break up and sometimes the screen goes blank. This last for about one hour after which the picture is fine. It has been back to the Teckguy's three time without success. They say they can't replicate the problem. We have set another TV up to the same system with no problems at all. I beleive the Techguy's don't set it up for testing using the HMDI leads. Could the problem be with the HMDI input port on the TV? Many thanks Joe Trotter

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Posted on Jan 02, 2017

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SOURCE: Sharp aquos lcd screen goes blank

The problem is most likely the the screws are loose on the inverter boards. The screws must be tighted as they provide the ground to the inverter bds. The inverter boards are undet the shields on both sides of the unit after pulling the back cover. One way to make sure that you are losing back lights and not video is when your picture goes black, shine a flash light on the screen at an angle and will see the video is still there. This mean the back lights are out. If you do not see the video it may be another problem

Posted on Feb 05, 2008

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SOURCE: ESA 42 Plasma picture problem

The power supply is having difficulty. The typical cause is underated electrolytic capacitors. I would examine all the caps (round cylindrical cans) in the power supply and see if any of them are bulged. Not a bad idea to just replace all of them with better rated parts.
These type of caps have all kinds of specs. Not just voltage and capacity, but also temperature, case size, and obtuse stuff like dissipation factor. Most all power supplies use switching type designs that run at serious frequencies (not the old 60 hz - more like 50khz) that stress out these electrolytic caps and many circuit designers (or their cheap bosses) don't specify the better parts. Replace them with the same capacitance, but higher voltage, and higher temp parts (hopefully they will not be too big physically).
Ya, I know you paid $$$ for this TV and they scrimped on cheap parts. Yup, the more expensive a product is, the more pressure the bean counters put on keeping the price down.
Hope Ya Fix It.

Posted on Feb 12, 2008

  • 1 Answer

SOURCE: TV SCREEN GOES BLANK

Yes your inverter is bad, I have the same problem my set is about 1 and 1/4 years old. Because Olevia makes a terrible product there inverters are attached directly on to the panel, which means they will only sell the inverter along with the panel i.e $700+ to replace + $100 dollars labor if u don't know how to fix it ur self. I am currently searching to find the manufacture that makes the inverters because olevia will not disclose that information. I believe it is darfon, if so the inverter should cost about $150-200 depending. If you dont believe you can fix it ur self ur best bet is try and sell the set for scrap take ur $100 or so dollar and buy a quality product! Oh and dont call there support they will tell 10 different things before u find out this long for seen truth!

Posted on Jun 20, 2008

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SOURCE: westinghouse 32 inch screen goes blank

I had the exact same problem and I fixed my Westinghouse 32 inch by replacing the power supply. You can purchase it at
http://www.partstore.com/Part/Westinghouse+Digital+Electroni/Westinghouse+Digital/4900211680/New.aspx?ModelMfgName=Westinghouse+Digital+Electroni&ModelBrandName=Westinghouse+Digital&ModelNumber=LTV32W1

I takes about 15 minutest to replace. Just take the back lower panel off and replace the power supply. Mine works like new now.

Posted on Jan 25, 2009

  • 80 Answers

SOURCE: Screen lower half goes black/blank

The lower "Y Buffer" board is defective. Best repaired by a technician, or contact Phillips support for the part if you think you are able to replace a small circuit board on your own.

Posted on May 21, 2009

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42lc46 zc


These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit stage inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power led, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating, to many popular brand TVs and other devices. Viewing it in "Mosaic" will make surf easy.
http://electronicshelponline.blogspot.com/
Blinking codes details to many popular brand TVs are given. Surf the site with patience.

Mar 26, 2014 | LG Televison & Video

1 Answer

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The most likely cause of this problem is the power board.

Take the cover off, make two-three good high-resolution up-close shots from different angles and send them so we can tell you if there are visible issues with it.

For more detailed troubleshooting you'll need a voltemeter and tons of patience.

http://www.coppelltvrepair.com

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you know sony is good brand name now people not trust sony because all made by koria same factory in samsung so some thing manufacture problem sony iso lot of complaint lcd tv panel are very less life time ony panasonic viera ips alpha panel is my opinion good becuse made by japan

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This is line output transformer problems. Before changing LOT,watch any dry soldering is there and also check vertical output ic is good or bad ?by replacement methode.
NOTE- if you know the protection pin, isolate the pin and switch on tv through 200watts bulb seriesly.then watch the symptomes.
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You need to replace the control board

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Hello
You will have to a tec. for this one as you have lost half of your vertical sweep.
Sorry
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Sky remote code for LG 42LC46 tv


After spending hours on this I found that code 0206 worked on my sky+ remote(with LG 42LC46). On an old sky remote, prior to version 4 (inside the battery compartment), just use 206.
This code was actually for a LG 42PX5D but it works perfectly on my tv.

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