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LG Rear Projection Television Model RT-56NZ23RB - Fault

Rear projection television switches off after a few seconds when turned on, no picture got sound

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  • 4 more comments 
  • hskg2000 Feb 29, 2008

    there was a bang sound from the tv, then I realized an IC is blown up. changed the IC but still no pic and have sound for a few seconds. do you think the fly back transf has problem?

  • qwertyman73 Mar 03, 2008

    my LG rear projection tv has gone with a bang! now it will click like it wants to turn on but will not. can you solve this one?

    hope its gonna be cheap!!

  • sanjguru Mar 25, 2008

    I have got LG RT-56NZ23RB for abt 5 years and suddenly now noticed left hand side of screen image has pink shadow. Meaning if theres a person on left hand side of the screen, there will be pink boarder around that person and the image not clear as well. I tried auto convergence but not no luck. Any solution.

  • Anonymous May 07, 2009


  • Anonymous Mar 19, 2014

    LG Rear Projection Television Model RT-56NZ23RB -turns on for 10 second with a good sound than gooes into stand by mode???The horizontal and vertical outputs checked,they are ok..What can i do after?

  • Anonymous Mar 27, 2014

    Model RT 44 54NA28



3 Answers

Go to and file a fault report, they will direct you to what you will need and how to get it.

Posted on Jun 04, 2008


For my LG TV - LG RT-56NZ23RB, I replaced two STK 392-120 chips and it has fixed convergence problem now.

Posted on Jun 09, 2008

  • hayes_hayden
    hayes_hayden Dec 24, 2012

    Did you replace the chips yourself? Please reply to It would be a great help if you could reply


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  • 8,617 Answers

Check your horizontal output and regulators also vertcal output.You have a deflection problem either Horizontal or vertical outputs or one of the regulators are faulty. Let me know if you require more assistance.

Posted on Feb 02, 2008

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1 Answer

Lg rt 56nz23rbLG Rear Projection Television Model RT-56NZ23RB -switches on for 10 seconds with sound but no picture and than switches off by going into stand by position.The horizontal and vertical outputs...

Thus problem sounds like you have some failed capacitors on the power supply circuitry. I have had this problem on an older TV and it was solved by replacing the popped caps. Do not try this repair yourself, unless you are confident you can do so safely! Also make sure that you unplug everything before poking around inside!

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Replace the stk convergence ics and also the 3.9 0hm fusible resistors.

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