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LG plasma tv rt44sz21rb. Have just changed projector lamp, but still no pic no sound. Fans running ok so power there but....any suggestion? Was working ok before projector lamp blew. Tobben

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  • tboe7 Jul 28, 2009

    G'day Rylee!

    Thanks for your response. At least you have given me something to work on. Unfortunately I am not a TV technician, just an old pensioner trying to help my daugther with her TV. Was hoping that just changeing the projector lamp would fix it, but....

    Used to be a ships radio operator in the 60's, and fiddled a bit with old black and white TVs, but things looks a bit different today!

    Hope you don't mind if I get back to you if I have other queries?

    Many thanks!


  • tboe7 Jul 29, 2009

    Hello again Rylee!

    Sorry about the delay in replying to you, but I am in Australia so there is a bit of time difference.

    Well, got the TV working again. Firstly found that the cover lid for the access to the projectorlamp has a microswitch (or interlock) on it. I tried without replaceing the cover. A bit confused because with the cover off the fans are running and with it on they stop. Understand it is for protection from the UV radiation.(?) However, the main trouble was that the remote control does not work at all, even with new batteries. So when operating from the set itself, the pic and sound came up fine! (Have to get her a new remote now.)

    Well, I feel like an old fool, but at least my darling daughter will be happy!

    Many thanks for your help and best wishes to you over there in USA!


  • tboe7 Jul 29, 2009

    Thank you for your assistance and patience!
    Great service.



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Hi Tobben

Look for swollen capacitors on power supply board. Please check the connections of the lamps. Also check the X board and Y-board connections. Projector lamp might have blown off due to excess or over-voltage, check the power board as well. These details can be checked by referring the service manual. If you don't have the service/repair manual you can download from below given link.

Here is the service manual for a similar LG model--

LG Plasma TV RT Series service manual Part 1

LG Plasma TV RT Series service manual Part 2

LG Plasma TV RT Series service manual Part 3

LG Plasma TV RT Series service manual Part 4

LG Plasma TV RT Series service manual Part 5

LG Plasma TV RT Series service manual Part 6

Note- Download all parts before decompressing.

Please do accept the solution if the issue is resolved or else revert for further assistance.


Posted on Jul 28, 2009

  • Rylee Smith
    Rylee Smith Jul 28, 2009

    Hi Tobben

    You can always get back by posting comments on the link provided and I will reply as soon as possible.



  • Rylee Smith
    Rylee Smith Jul 29, 2009

    Hi Tobben,

    Thanks for using FixYa. Thats really great that your TV started working again. You can always get back to us and we will be happy to assist you.

    Please do accept the solution if the issue is resolved or else revert for further assistance.




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