Question about LG 42PX5D 42 in. Plasma HDTV

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My tv has sound but no picture, how do i determine which board it is? its a lg 50pg20d

Was working fine, no signs of picture quality dying, just turned it on and there was sound only.

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Y-sustain board is faulty

Posted on Jan 12, 2013

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Posted on Jan 02, 2017

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SOURCE: 42 inch LG Plasma TV - Lost picture

Our LG 50" plasma tv screen went black after a popping noise but still had sound, after great diliberations decided to take the back off and have a peek!
We unplugged the tv and tested the fuses (there were three we could see) one had blown, the one on the left as you look at the back of the tv it also has one above it. We wrote the code/seriel number down and took the fuse to the electrical wholesalers Maplin and bought a pack of 10 fuses for £1.29 replaced the fuse in the tv and everything now fine!!!!!!
Hope this might be of use to anyone whose lost the picture after a loud popping/snacking noise but still has sound.

Posted on Jan 17, 2008

dutchman05
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SOURCE: LG LCD/DVD TV no sound on TV - DVD works fine with sound!!!!

HERE is the servce manual for this TV

Posted on Jun 21, 2008

  • 1 Answer

SOURCE: LG 42" Plasma - Sound but no picture

It might be one of the fuses that blew up.. they cost like 3bucks for 4 of them at any radioshack or electronics store. But recomend getting someone to do it who know how, i had same problem and accidently messed stuff up so insted of $3 bloblem it turned into $400.

Posted on Nov 27, 2008

  • 13 Answers

SOURCE: 42 inch LG Plasma TV - Lost picture

This is almost certainly the device that sends electricity to the the plasma in the panel after failing. Bring to your local repair shop and expect to pay 300-400 parts and 100-200 labour.

Cheers,
Stephen

Posted on Apr 28, 2009

  • 1 Answer

SOURCE: LG 42PX4MVH PLASMA TV - Sound but no picture.

I have the same issue with my LG 42PC3DVA and I narrowed it down to the Y SUS board. After a little research there are a few items that are prone to go. The ceramic fuses (as you found), sometimes the capacitors on the Y SUS, Z SUS, and power supply go along with them You can tell because thy will be bulged at the top instead of flat. I replaced a few of my capacitors - they are only $0.89 each so it was MUCH cheaper than a board.

The other thing that is common on the Y SUS in particular are the FETs (also called MOSFET). They can be replaced if you are good with a soldering gun but they are static sensitive so be grounded. They are also a bit tricky to test so you may want to do some research on how to determine if this is the issue... or you can just replace the whole board.

Posted on Oct 28, 2009

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1 Answer

On power up the led flashes 6 times and then turns red, tv will not turn on for 30 minutes or so then it works again for maybe 2 -3 hours then it happens again


Your power board is defective. diy price about 50 to 100.00. Check on Ebay with your model # for power board. Board has about 4 screws and 3 to 4 plugin.

Sep 03, 2015 | Televison & Video

1 Answer

The picture is almost like it is out of convergence it gets better when brite and contrast is turned down


Good day sir John!!!!

That problem is usually cause of bad T-con board (T-con board is the one that responsible for the quality of picture) in normal bright and contrast you see the color/picture is distorted..The color is like over tint and the quality is not good..

However,there are some points to consider like wrong settings and weak/bad connections of digital cable..

Try this steps:

For wrong settings-to determine if you have a wrong settings or you press wrong buttons on remote..Try to go to menu and find default settings or factory settings then press enter to restore factory settings in this procedure all previous settings return to original so the tv is works fine after this if your problem is in the settings..

For digital cable fault- You can determine the problem by playing DVD movies on your TV if the works fine in DVD movies.Your TV is good but there something wrong with the connections of your digital cable please let me know!!..Or you can try to wiggle the coaxial cable on the rear side of your TV and look at the TV screen while you do that and see if there is any improvement or reaction of color/picture try to fix the coaxial wire...

If the above procedure not worked the problem is on T-CON board let me know first if you decided to replace it for proper instruction on how to replace to avoid damage and for your safety..

Just keep on touch sir!!!!

Thanks for choosing my service..

Hope it helps.

Bonifacio

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My LG Lcd tv takes a minute or so to turn on then sometimes the picture flickers and goes out. The tv is on but no picture or sound. When I try to use the menu button on the tv it doesn't work. Whe


The fact that you have no menu or onscreen display, leads me to believe that it is the main logic board. Either the processor ic or the voltages going to the main board are missing. Check to see if the main board is getting 5v and 3.3v to determine if it is your power supply not supplying the voltages or your main board.

Oct 26, 2011 | LG 42LC2D 42 in. LCD HDTV

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Plasma tv takes time to start then picture flickers really badly then picture returns as normaal for a few hours then goes black but still has sound i turn off tv for a number of hours & repeat the...


This tv seem to have two problems.The problems that the tv take a long time the tv to turn on,the tv power supply board have dying capacitors most likely.That the board where the power a/c cord plug into it.The picture flickers badly this problems is harder to determine because this causes by two backlight buffers boards X,Z buffers boards could be either one it is dying.This tv should get an estamate by a shop or shops and repair it by them,bcause the tv must have to be doing replacing x munbers capacitors components to the tv power supply board and alot more work to trouble shoot and to detrmine which of the buffers boards it is the causes of to the picture screen to be badly flickers and replacing it.

Jun 10, 2011 | LG 42PX8DC Plasma TV

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I have a 32lc7d tv and i cant get it to turn on all the time. the on light will be green but no sound or picture. the light also blinks about 15 times before going to a solid green color. the tv will...


This problems ur tv are having are only can be causes by two boards,the tv power supply board or the tv Tuner signal board.The tv power supply board that the board where the power a/c cord plug into it.The tv Tuner signal board that the board where the incomming broadcasting signal wire plug into it.This problems very easy to fix.If it is the tv power supply board is the causes,because u can check the tv power supply board carefully u will find dying capacitors parts that will bulging up or puffing up on to it tops.U have all the tools and know basic electronic just replaced all the dying capactors for all new capcitors parts same micro ferit but the capacitors voltages like 5 or 10 voltages higher for better heat resistance for the life of the tv power supply board.If it is the tv Tuner signal board,very hard fix and determine where the dying parts are in this board,because this board is cover with many ICS chips on this board.If the tv the Tuner signal board is the problems best just buy the whole refurbish tv Tuner signal board for the replacement.Or u can tries websites like Shopjimmy.com,Ebay.com to buy the whole refurbish tv power supply board too,if u don't know how to or have all the tools to replaced those dying capacitors parts and also can buy the whole refurbish tv Tuner signal in these two websites too.

Apr 16, 2011 | LG 32LC7D Television

1 Answer

I have a lg 42 in flat screen. the sound works but no picture any ideas


Now,tv on,u have a flash of picture few sec.dies have sound left only?Yes,than those 2 long boards call the LCD inverter boards is dead.These 2 long LCD inverter boards provide a backlight to the LCD screen to produced a picture.Tries websites like Shopjimmy.com,Ebay.com to buy those 2 refurbishes long LCD inverter boards for the replacement.

Sep 15, 2010 | LG 42LG50 42 in. LCD HDTV

1 Answer

42 inch LG Plasma TV - Lost picture


If you paid by cheque or credit card, that is your proof of purchase.

Mar 09, 2017 | LG 50PG6000 50 in. HD-Ready Plasma TV

2 Answers

LG "NO PICTURE" , IF FIX WILL RECUR? ,DID LG FIX DESIGN FLAW 42PC3D


I had same problem - no picture, but sound worked - LG 42PC3d - was two months past warranty, but LG agreed to fix it as a warranty call. Service guy was out within a week to replace the Z SUS(?) board. Works fine now. This must be a typical problem, as LG did fix it, even though the warranty had expired. Good luck.

Nov 03, 2008 | LG 42PC3D 42 in. Plasma Television

1 Answer

42 inch LG Plasma TV - Lost picture


Hi , I recently had the same problem which I was determined to fix . So I did a few weeks of research to find that it was the Y SUS board which burns out. I'm sure you realized that the TV gets hot. Personally I think this is why. circuit boards don't like heat and I've learned that the cooling fans are a joke. I replaced the board and got my picture back. I proved the fan theory because after the screen started to act up. I placed a cooling fan near the vent holes on top and the problem cleared right up,It also helps if you lower the brightness which helps out on the heat situation.I will soon be adding a fan with a temp. sensor. This shoud help if your screen has lines when you initially turn the cool TV on.then I have Some other costless solutions. Hope this helped these are great TV's and like our cars we maintain them not throw them away..................................Mr Wiseman

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1 Answer

Very faint picture but sound is fine on my 50" Zenith plasma


Sounds like the Z-sustain board went bad. You will need the board replaced so make sure you find an LG authorized servicer.

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