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I have an lg 50pg25 and my house was struck by lightning. the tv makes a clicking noise when i press the power button and the screen appears to come on, but when i try to bring up the menu or inputs nothing comes uo.

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  • lowetide1 Sep 09, 2009

    Thanks for your help, i am new at this tv repair thing and not quite familiar with what i would do to test each thing i do have a multimeter so i can. If you could give me a brief description of what each one will look like and how to test them. I know how to test the capacitors but not a 100% sure which ones they are. Sorry to be a pain but i have no tv repair guy in my area and would cost a lot to get one here, so please bare with me.



  • lowetide1 Sep 09, 2009

    Also if power supply is bad, i assume i will have to change the whole thing and how much would this run.

  • lowetide1 Sep 09, 2009

    what are the odds that it is just the power supply and no further damage. I only ask this because if i find the power supply bad and i replace how confident would you be that it is not more than the power supply. Is there anyway to bypass the power supply.

    Also do i look for no resistance in transformers and relays too.



  • lowetide1 Sep 09, 2009

    Ok thanks alot i will do this tonight and reply

  • lowetide1 Sep 09, 2009

    please forgive i gave you wrong model #,dont think it matters but just incase it is a 50pg60.i have the power supply out of the tv, but as i expected it is quite complex. There are some big silver box like things that i assume are cooling fins. There are alot of black cylindrical shaped things not sure what these are. There are also two rather large black cylinders. There are two open windings with no tape and they each have a blue box next to them. There are 2 coils standing vertically on the board they are wrapped in yellow tape and each have a bracket over them. There are also two coils laying horizontal that are in boxes and wrapped in yellow tape, one bigger than the other. I'm thinking the larger one is transformer. Which ones are the capacitors and relays.



    Thanks

  • lowetide1 Oct 02, 2009

    i replaced the power supply but my tv is still doing the same thing. which is when i press the power button there is a clicking and a visible change on the screen as though it is on, but when i try to access the menu or input or volume or anything for that matter nothing shows up on screen.

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  • Master
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You need to take it apart or have a service technician take it apart and examine the components to see what got burnt. generally due to the high voltage of lightening, it is cheaper to replace then repair.

your homeowners insurance should cover it

Posted on Sep 10, 2009

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  • Master
  • 1,188 Answers

You need to check the power supply for problems. This involves dismantling the TV set and you also need a multimeter.
Lightning, when strikes, can send thousands of volts through the circuit. Even though your TV was not directly struck it could be through other input cable like antenna or external dish.
Check for the transformer and relays. Also check voltage across the capacitors. Having zero resistance between the capacitors means they are damaged.
Note: discharge the capacitors first before checking their resistance. Just remove the power cable and turn on the TV to ensure there are no high voltages.

Posted on Sep 09, 2009

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  • Adnan Bhatti
    Adnan Bhatti Sep 09, 2009

    You mention that you are new to this repair stuff. Please be aware that your plasma TV is a highly complicated device. If you are not familiar with repairing then do not remove any soldering. Only detach snap-on cables so you don't break any connections. For your reference the power supply unit looks like this but may be different in your set:





    You can remove the power supply board and get it repaired or better get a new one.
    Please comment if you are not satisfied.


  • Adnan Bhatti
    Adnan Bhatti Sep 09, 2009

    You state that the screen appears to come on and there is a clicking sound. This indicates a faulty supply. Please note that without personal inspection no one can be 100% sure about what is wrong if any electrical component has been subject to an incident such as a lightning strike..
    Typically, a transformer is pretty stable item. If it doesn't smell
    from having been overheated it
    is probably okay.
    If you can remove the power supply unit then you see the voltage ratings printed on the circuit board. You can use these to check for any abnormal values.



  • Adnan Bhatti
    Adnan Bhatti Sep 09, 2009

    Yes please, I will be waiting for your reply on this matter.

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