Question about LG Televison & Video

3 Answers

I have a LG -LCD TV , model RY-23lz21 , 22'' TV . There is a 2' bar of static going thru every picture. How can I fix this myself? Maureen

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  • 6 more comments 
  • moeaddin Sep 01, 2010

    Hi,



    what is an IC (integrated chip) and aproximately where would I find It?





    Maureen

  • moeaddin Sep 01, 2010

    on the green circuit board?

  • moeaddin Sep 01, 2010

    I can't seem to locate it. I have taken the back panel off. There is a green ciruit board. Is it on there?

  • moeaddin Sep 01, 2010

    Thank you. I will download a service manual.






    Maureen

  • moeaddin Sep 02, 2010

    I finally found the IC chip. There does not appear to be anything wrong with it. Banged on it and I still have the same problem. Any other suggestions?







  • moeaddin Sep 02, 2010

    I have a blue column of static going through my picture. How can I fix this?

  • moeaddin Sep 02, 2010

    thank you. I will work on getting a quote.

  • moeaddin Sep 07, 2010

    Hi,




    How would i know if the capacitor has leaked and what is the SMPS power supply. Where would i get a new capacitor from?






    Thanks




    Maureen

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3 Answers

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  • LG Master
  • 17,130 Answers

Checck if there is a capaccitor that has leaked in the SMPS power supply section. If the filter capacitor is weak this ripple of noise can come over.
Similarily the same noise can come from the secondary section , so check or replace suspected capaccitors.
finally check for any grounding issues of the chassis or the shield of the HT sections, thee input sections.
Tighten all grounding screws or PCB ground.
Any dead insects inside can also cause a bridge in circuit and bring in these noise bars.

Posted on Sep 03, 2010

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  • LG Master
  • 11,800 Answers

If the bar is there whatever the source of the image (tv, cable dvd player, all) then the fault is in the image processor located on the mainboard - it's buffer memory is defective and the data stored in one block is corrupted so it's displayed as static.
The mainboard to which the processor is soldered must be replaced. This is a job for someone that has at least basic experience of electronics. And you need to find a replacement board cheap enough to worth its replacement get a quote from the local LG repair shop, it might just not worth it.

Posted on Sep 02, 2010

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  • Master
  • 11,896 Answers

Remove the back panel of the tv. You will see an IC (integrated chip) Check the solder joints on the chip. Make sure none are loose or are seperated from the contacts. If they are, put some new solder on them for a good connection.
If the solder joints are good, and there are no burn marks on the circuit board and no swollen parts, then try gently tapping on the on the chip. This sometimes gets it to react properly.

Posted on Sep 01, 2010

  • 3 more comments 
  • Nate Stansfield
    Nate Stansfield Sep 01, 2010

    It will be on the main circuit board.

  • Nate Stansfield
    Nate Stansfield Sep 01, 2010

    Yes it should be on the circuit board. Sometimes they are also square instead of rectangular. If you google Integrated Circuit Chips, you can see different styles of them.

  • Nate Stansfield
    Nate Stansfield Sep 01, 2010

    You can also download a service manual which may help.

    www.free-service-manuals.com

    www.retrevo.com

    www.schematics.me/model_list/tv/lg.html

  • Nate Stansfield
    Nate Stansfield Sep 01, 2010

    I believe it will help greatly. I have to use them myself. They are hard to find, but you should see the links I provided which will lead you to the manuals. If you need anything else, let me know.

  • Nate Stansfield
    Nate Stansfield Sep 07, 2010

    Leaking capacitors are usually swollen. Sometimes but not always, there may be a burn mark on the circuit board. partstore . com and shop jimmy and another sites will carry them.

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