Question about LG RU-44SZ51D 44" Rear Projection HDTV-Ready Television

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Rear projection lg lcd 44 inch

Has shadow on right of screen top to bottom was small but gets bigger as tv is used

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  • Austin Magruder
    Austin Magruder May 07, 2009

    I have the same problem...
    I ordered some new mirrors but I think they are not going to show up

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Is it an LCD or DLP? The Model below suggests it is an DLP. Sounds as if you have the dreaded light tunnel collapse common to all LG DLP TV's. Inside the light engine there is a square tube made up of four mirrors. These mirrors deform and crack with the heat of the lamp. They fall down over the light aperture and cause a shadow of varying degrees. It is fixable now at a realistic price ( used to have to replace engine) as LG have made the parts available. It would take a competent tech around three hours to complete or if you are technically minded you could do it yourself. I hope this helps. Good Luck.

Posted on Sep 30, 2007

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1 Answer

I have a 62" LG that has the same look as the tv in the photo.


Test,play a DVD movie,see if u have that shadow,If yes,than ur Tuner signal board have problem,must change it.Not than it ur comming in signal have problems,Call ur cable or satalite provider to check the signal.

Feb 08, 2010 | LG RU-44SZ51D 44" Rear Projection...

1 Answer

Shadow down left hand side of screen


Is it an LCD or DLP? The Model below suggests it is an DLP. Sounds as if you have the dreaded light tunnel collapse common to all LG DLP TV's. Inside the light engine there is a square tube made up of four mirrors. These mirrors deform and crack with the heat of the lamp. They fall down over the light aperture and cause a shadow of varying degrees. It is fixable now at a realistic price ( used to have to replace engine) as LG have made the parts available. It would take a competent tech around three hours to complete or if you are technically minded you could do it yourself. I hope this helps. Good Luck.

Jul 30, 2008 | LG RU-44SZ51D 44" Rear Projection...

1 Answer

LG rear projection


Hi, I used to work in Best Buy and one of the key things about rear projection TVs and the reason they push those service plans on you is that the tubes/colors need to be calibrated each year. You can do this yourself by checking out the following website:  

http://lgknowledgebase.com/kb/index.php?View=entry&EntryID=3229 

If you are not able to adjust the convergence using the remote you will need to replace the convergence chips. 

Typical Symptoms

1) Convergence menu does not work for one or more colors.  
Such as: Red moves up,down, but left or right fails. 

2) Screen is bowed looking.

If you have one or more of the problems above you need to replace the convergence chips. You can get a kit and instructions from www.TvRepairKits.com  

Hope this helps :) 

Jul 30, 2008 | LG RU-44SZ51D 44" Rear Projection...

2 Answers

Red screen on LG 44-inch DLP


Go to this site, follow the instructions, and it might fix your problems. I did, and my tv is better than ever!

http://www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.html

Mar 28, 2008 | LG RU-44SZ51D 44" Rear Projection...

8 Answers

Zenith lcd with a yellow dot


CALL LG I HAVE THE SAME PROBLEM WITH MY TV AND THEY EXTENDED MY WARRANTY FOR A NEW LIGHT ENGINE I HAVE HAD MY TV SINCE 2004 AND THEY PUTIING A NEW LIGHT ENGINE FOR FREE IN 2009

Dec 13, 2007 | Zenith E44W46LCD 44" Rear Projection...

1 Answer

Lg 44inch dlp


This could be a problem with the light funnel or alignment of the light engine.
I woud contact a service center for a quote.

Nov 19, 2007 | LG RU-44SZ51D 44" Rear Projection...

1 Answer

Green effect on top of the picture of my LG ru-44sz51d


it sounds like an adjustment is needed/call for service and a est.$

Nov 10, 2007 | LG RU-44SZ51D 44" Rear Projection...

1 Answer

Small bluish, black triangle at far right corner


This is the same problem as other posts have mentioned about the right side of the screen having a bluish-balck stripe down the side of the screen. Here's what's happening. There's a small light tunnel which has 4 very small mirrors located just behind the color wheel. The lamp shines light through the color wheel as it turns and the light goes through this small tunnel and is then relected off several mirrors before it is projected through the lens and onto the screen. Optoma apparently did not use a very good heat resistant expoxy glue when they assembled these mirrors and over time the mirrors drop down causing a shadow effect on the screen. It can be repaired without paying some repair shop a small fortune. Previous posts have a solution from another contributer whihc includes photos. I had to repair mine and it's worked fine since I used a decent expoxy to hold the mirrors.

Sep 28, 2007 | Optoma RD65 65" Rear Projection HDTV

1 Answer

Zenith E44W46LCD


This is likely a bad light engine, or so I'm told by the LG electronics. The cost of the part can be as much as you paid for the set itself. Call customer service and let them know of your problem and then ask to escalate the issue. LG electronics, although not admitting fault, tried to find a service rep but eventually bought back my set at a pro-rated amount. Overall, I was very satisfied with their support. Best advice I can give you is to not buy a rear projection set again, LCD or DLP. Lamps are expensive and design is unreliable. LCD flat screen is your best option, in my opinion.

Aug 29, 2007 | Zenith E44W46LCD 44" Rear Projection...

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