Question about LG RU-52SZ30 52" Rear Projection Television

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2003 rear projection tv

Small hazy blue area bottom right when tv is turned on--but by about one half hour's time, the entire screen has the hazy blueness. I don't want to be taken by the "repairperson", so I just need some solid direction before calling. If it's going to cost more than the tv is worth--I'll just pitch it.

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  • maddogy Jul 29, 2008

    Same problem & same issues.



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This problem was fixxed for me for under a hundred bucks at my local repair shop, he took of the back and with a tiny screw driver adjusted a few things and then it worked perfectly....

Posted on Dec 09, 2008


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Hisense TV - right half is blue

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When tv is turned on, in about 10 to 15 seconds the screen goes blue. If the tv is turned off, then turned back on, the picture is fine for about 10 seconds then back to the blue screen.

This is simple--this model is prone to bad picture tubes--blue is most common--screen goes bright blue and set shuts off--set is detecting too much current being drawn--forget replacing the tube--very expensive as only available on rebuild basis.

Here is what to try:
1) you need to remove entire plastic grill under screen--held in one of two ways--either several screws on back on either side or two screws at bottom front under caps.

2) With it free, pull up from bottom and tilt entire grill to the left--the front controls are mounted in it and you will need to undo some ties that hold it to get it out of the way.

3.) Grill has tabs at top that tuck in and you lift it from bottom.

4.) Remove small inspection plate behind grill--a few screws.

5.) Directly behind grill you will find a square black plastic block with 6 shafts (they are controls) One row left to right will be marked Focus--do not touch those. The other row will be marked screens. Look closely (green is the middle one) as each will have r,g,b in small black letters.

6.) In your case LOCATE THE BLUE SCREEN CONTROL. Best way to do this is take set to unused video input and turn blue SCREEN down (usually to the left and less than 1/4 turn) until the blue just goes away---on blank input you should only see VIDEO 1 etc in green.

Do not turn down too much--just enough so blue is not there--no blue background or curved lines.


You only have seconds if the set is shutting down, Once you get the blue down enough set will stay on.

Take to regular channel and with color all the way off--you should have a black and white screen, adjust just a little if needed.

I have done this many times and most get another year or more out of the set--if one of the tubes is causing this (very likely) sooner or later it may get worse and return to the point where adjusting does not help--when this happens replace the set.

If this has told you something that helps you or you did not know rate this solution as very helpful as I do this here for free.

If you have questions let me know BEFORE you attempt it.


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