Question about LG 50PA4500 50" 4500 Series Plasma HDTV

1 Answer

Won't power on

After going into Settings and auto-updating the channels, my TV powered off completely and now will only stay in a sort of standby mode where the red power light will be on but the TV itself won't display anything. Every time I press the power button it makes a clicking sound, the red light goes away for a second, and then it comes back and stays solid. I've tried switching out the cables and trying different electrical outlets. I don't understand what could have gone wrong here. Please help.

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  • LG Master
  • 928 Answers

Sounds like a Zenith or LG TV. It is most probably the Y board, when you hear the clicking sound is usually that. I am sharing this with you because it happened to me with a Zenith (POS). The red light (on my TV) is in the bottom right corner. In my case it was the Y Board. Best of luck

Posted on May 15, 2017

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Posted on Jan 02, 2017

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dsacco86
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SOURCE: 42 LG plasma no picture but sound. found internal

Sounds like it started "Protection Mode" because of a failed electronic part inside the TV. When this happens, the TV will keep turning itself OFF or will not turn ON at all. This keeps the other parts inside from being damaged. Most likely the TV has a power supply related problem. The common part to go bad for flat panel screens circuit board that powers the screen itself. Most manufactures call it a Backlight Inverter Board.
But, I can't say what is 100% the problem because I can't actually look at the tv over the internet. I can only make guesses with the symptom.

You have a few choices:

1. Best thing to do, if you can find and purchase a Service Manual over the internet; It will help you diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, schematics, test points, and part# lists.Usually, cost under $20. Its the best repair guide material for fixing TVs. And most cases the new part cost less than $15 by searching on the internet with the part number.

2. Pay a TV shop to do the repairs. It maybe costly, but get an estimate of how much they will charge. That way you can decide if it worth repairing or replacing the whole TV.


I hope I shed some light on the subject for you.

Posted on Jul 21, 2009

jdvillanueva
  • 2098 Answers

SOURCE: I have an lg plasmas model # 42pc5d-uc\r\nthe tv

Hi Paul,

This is an indication of out-of-regulation in the power supply section. The very common caused of this fault is the dried-up/leaky electrolytic capacitor in that section. It will drop the supply from normal voltage and will disable the unit and blinking error appear. Sometimes it has a bulged/dome at the top but not all, it is better that you have a capacitor checker/tester to determine its condition. Also, bad solder joints can produce the same symptom, it is hard to spot, you should use table lamp/portable lamp for finding the cold solder. Secondary reason of fault is the open fuse/fusible resistor in series with the output of regulator IC/transistor, shorted/openRegulator IC/transistor, shorted zener diode(all are in the power supply section) and the microcontroller. Best that you check the output voltage of each regulator to determine where the fault came from and narrow the job.

If you don't have necessary tools and test instruments, and can't do the job yourself, I would advice you to look for a professional to troubleshoot the problem. Don't attempt to work in the power supply if you don't know the safety precaution of handling it, there some stored electricity enough to hurt you with a little mistake only.

Also check if your unit is under warranty /extended warranty, avail it because the manufacturer of your unit will fix it for free. Don't open the back panel, this will void the warranty.

Hope I helped you.

Have a nice day!

Thanks for using Fixya.

Posted on Mar 01, 2011

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  • 2 Answers

SOURCE: TV always in standby mode and can't display channel. Need press many times

Go to Badcaps forum online

Posted on Dec 07, 2011

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