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Have LG 50PG20 PLASMA TV .......Made loud popping sound and screen is now black but sound still work. Any ideas which fuse or relay to try replacing first???

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The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Posted on Apr 15, 2017

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LG plasma 50 inch tv with a fine vertical black line in the center of the screen that runs from the top of the screen to the bottom


Try changing the input device to something you are sure works. Switch off TV manually, switch off power, remove plug and retry after 48 hours. If problem persists, please refer it to a qualified service technician.

Jul 25, 2012 | LG 50PG20 50 in. Plasma HDTV

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While watching tv loud pop at rear then tv went off,bits of oily debris on shelf underneath


The fault is with the power supply regulator board. Bursted capacitor. It will be best to replace the power regulator board to plasma TVs, rather than making 'surgery' to it. Contact the authorised service center for LG at your town to purchase a new power retulator board. If you are not handy enough replace it, seek tech assistance.

Jun 01, 2012 | LG 50PG20 50 in. Plasma HDTV

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My lg plasma tv popped and now won't come on


Lisa, not 100% on the part you need to fix. But, try these guys out.....http://www.shopjimmy.com/catalogsearch/result/?q=LG+50PG20.
TeeVeeMan2@gmail.com

Oct 06, 2011 | LG 50PG20 50 in. Plasma HDTV

1 Answer

LG 50PG3000 Tv has just gone pop, and a large crack has appeared on the screen and it is very hot... any ideas what this is and how much to fix?


Electrical short, which has fried the MOSFETS... Normally these are meant to "break" and not allow any more voltage through, in this case they have broken and fused, still carrying voltage.
This is not cost effective to repair as many parts have been effected.

Mar 05, 2011 | LG 50PG20 50 in. Plasma HDTV

2 Answers

I heard small pop then lost power while watching my lg 50pg20. No red or blue lights on the power switch. What could be wrong?


you are describing a power supply defect. IT may be as simple as the main fuse. I believe the one in this set is a 6.5 amp located on the ps board right by cord connection. IF after replacing the fuse opens a second time you will need to replace the power board.
p[lease leave feedback

Feb 20, 2011 | LG 50PG20 50 in. Plasma HDTV

2 Answers

LG 50PG20 Plasma,, nothing shows on screen its all black


This model was known for issues with the Y-sustain, Y-drives, and the Z-sustain boards. These boards help process the picture image to the screen.

When one or more of these boards fail, the screen stays black, and you only have audio & on/off.

You could call LG and try to get your TV repaired at a discount if you can convince LG to honor this known issue.

Another issue could be the actual panel has gone bad. The plasma panel in your TV has a two warranty and LG would fix that for free. Well…it would be free as long as it’s not past two years of your date of purchase.

What zip code are you in?

Jun 18, 2010 | LG 50PG20 50 in. Plasma HDTV

2 Answers

My LG Plasma television DU-42PX12XC had a loud pop


Your tv contains protection circuitry that would shut down the tv if the ymain was out. If the ymain had blown, you'd have no sound and just a flashing standby light. My gut tells me you need to replace the Power Supply Board (PSB). I've seen this before and after spending too much money trying to diagnose a ymain failure, I was surprised to learn that when you have sound but no picture, the psb is a gonner. Try ebay, shopjimmy.com or discount-merchant.com for a replacement.
Good Luck!

Apr 20, 2010 | LG DU-42PX12XC 42 in. Plasma HDTV

1 Answer

Loud pop Blank screen 42 inch Viore Plasma


Unfortunately, that board is the inverter board. And for this model the inverter board is only supplied with the the PDP panel. The panel is quite expensive, here's a link if needed:

LG 42PX5D Replacement Part PDP Plasma Display Panel

Dec 26, 2008 | LG 42PX5D 42 in. Plasma HDTV

34 Answers

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.

Dec 31, 2007 | LG RU-42PX10 42 in. HD-Ready Plasma...

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