Question about LG 50PC3D 50 in. Plasma Television

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When i turn my lg model # 50pc3d on, it makes a loud popping noise and immediately turns itself off.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: LG Plasma TV 50PC3D

The TV should be under warranty. Send back. Sounds like the panel is faulty (half the value of the set).

Posted on Feb 06, 2007

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alltechserv.
  • 32 Answers

SOURCE: Same problem. Was watching my LG 50PC3D, then a loud pop noise

Replace the y-sus board located on the right after removing the back panel.

Posted on Jun 10, 2009

  • 4090 Answers

SOURCE: LG TV NOT TURN ON

To let you know , there jave been may claims against this 42" model There were some models released that had faulty power boards and video controller boards. LG recalled many of these to have them replaced

No picture and sound is Y +Z Sustainer problem.However, normally they have to change both Y Sus and Z Sus boards atthe same time. If you lucky than it's just a fuse on the Y sustainerblown (the chance is very rare) otherwise the IPM (Intelligence PowerModule) on the Y/X sustainer board is short. This is a common problemand costly to repair.
Is it under warranty or Extended 5 year warranty? If so get it repaired now.

Call customer service for help 877-543-8325 to try them first

If you are skilled in electronics the cost of parts is about $250 online (Otherwise add another $400 for labour and travel if you use a tech ) Always ask for a quote first))
Just ensure you select the right model as i am unsure this link is correct one. But the place itself should have your model
http://www.electronica-usa.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=EU&Product_Code=6871VSNB03E&Category_Code=PLA

Please rate our help to =keep the FREE service online++++Thanks for using FIXYA

Posted on Sep 14, 2009

fieldy14
  • 456 Answers

SOURCE: LG Plasma 42pc3d turns on, pops, turns off

Its very likely that you need to have LG perform a sodtware upgrade on your unit. Contact LG and see if your tv is one of the applicable units with software upgrade issues, please let me know if it works. Good Luck.

Posted on Dec 03, 2009

jan mczeal
  • 632 Answers

SOURCE: LG Plasma 42pc3d turns on, pops, then turns off

The first thing you should look into is the Z-SUS board, the one situated on the right side viewed from the rear. This board develops a high voltage during operation that might be the source of the popping sound. It is also responsible in refreshing the panel for proper picture display. The weird colors on your TV indicates a faulty Z-SUS board.
Note: Unplug the TV and wait for at least five minutes in order to allow the voltages to drain before you disconnect or reconnect any connector.

  • Disconnect the Z-SUS board from the Y-SUS board. The Z-SUS board is situated on the right side viewed from the rear of the TV while the Y-SUS is on the left.
  • Plug the TV back and turn it on.
  • You will still be able to see the weird colors the moment the TV shut off but do not flash. If it does not pop and stays on and there's a sound, you are pretty sure the Z-SUS board is faulty. Replace it.
  • If it still pops and shuts off, disconnect the Y-SUS board from the power supply. The Y-SUS board also develops a high voltage during operation. The power supply is the one right between the Z and Y-SUS boards.
  • Re-apply AC power then turn the TV on.
  • You'll not be able to see any color or video. If it does not pop and stays on with sound, you have a faulty Y-SUS board, replace it.
  • If it still pops and shuts off, please let me know.
Feel free to update me of the result and your own findings.

Posted on Dec 04, 2009

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If there was a loud POP! sound when it turned off then you will have to replace a sustain board.

If there wasn't, then you're more likely facing either a power board or main board replacement. It can;t be said which one of the two based only on the described behavior - can be either.

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Without seeing the unit itself and opening it up/running tests I couldn't tell you exactly what is happening, however I can offer some suggestions as to what it could be.
1) your power supply is bad. That clicking sound is the power relay coming on and going off. 
2) your main board is bad. It handles a lot of your signals for powering on your set. If it's bad, the tv won't turn on correctly as it doesn't recieve all the right signals.
3) your Y or Z boards are bad. These could cause the power supply to go into shutdown if the voltages on these things are too far out of whack. 

Easiest way to tell if you're going to go into your tv is to try to unplug your Y and Z boards and turn it on. If it turns on and stays on chances are one of those two boards are bad. 

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open backcover
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top left side of powersupply you'll see 5 capacitor 3300uF 10V.
see any pop up on top? replace it All with same rate or 16v is O.K.
do not use temperature rate 75c. Use 105C.
if you know how to solder. you could save $300 at least! Mahalo!

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