Question about LG 42PG20 42 in. Plasma HDTV

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TV won't turn on

We just bought a LG 42" Plasma 42PG20, and we cannot turn the thing on. It will turn on, then 3 seconds later shut it's self off....any ideas?

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  • Anonymous Jan 04, 2009

    I had my LG 42" Plasma 42PG20 for eleven days and everything worked fine then one day it stopped working. I noticed that after it wouldn't display anything that the power button on the unit flashed two short then one long flash. I had unplugged the unit for a couple of hours then plugged it back in and it turned on. When I tried to entered into the auto tuning section to get the channels back it stopped again. Does anyone know what the codes mean for this instance?

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5 Suggested Answers

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SOURCE: 42 inch LG Plasma TV - Lost picture

ysus pcb that supplies voltage to the panel is faulty

Posted on Dec 15, 2007

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SOURCE: LG 42 plasma quick blank flash

use other source such as dvd , regular ant or vcr ..use other source for awhile to see if it happens on ther sources .

Posted on Jan 07, 2008

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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

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SOURCE: LG 42 plasma power problem

needs power supply Part number 6709900023A
it is a 171 dollar part, you should be able to order through LG,

Posted on Jan 10, 2009

Senco
  • 51 Answers

SOURCE: Dell 42" Plasma no video or audio blue light on

Do not dump it, it is great TV!
Y SUS and Buffers are usual culprit.
You can get it from guy at
plasmatech@gmail.com
He has everything for Dell TVs

Posted on Aug 28, 2009

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There are several known issues that can cause that.

The top candidate is the main board, the next is the Y-Main board.

Here's a link for repairing the power supply board of LG 42PG20, which also contains a link to how to test your own board to see if it is good or not:

http://www.coppelltvrepair.com/p/716/lg-42pg20-ua-power-supply-board-repair-service

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caypianan@yahoo.com

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