Question about Sony KP-51HW40 51" Rear Projection Television

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Green cicular lines appear

The guns had been replaced about a year ago, but since then i get thin green lines that used to only show if the image was dark, now they are getting more apparent

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Re: Green cicular lines appear

Bad green CRT = try turning down green screen control
behind front access panel...................T.

Posted on Dec 04, 2007

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A horizontal band of green and red lines across the screen

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience.
Line, faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent.
Type in the brand name to your device, in the search box [at the top right] of the display window and the Search will start at once as you type in, and will show you all the related posts. It will make surf easy.

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LG Projection TV Model# RT-49NA11T Green color gun shows bent arc on top & bottom.Red & blue guns are ok.How to adjust the green gun to remove the bent arc. This is causing picture shows mix...

This problems ur tv have can't not be fix by adjustment.The tv have a problems known as convergence problems,it dead.Tv have colors lines R,G,B mis alignments,have colors shadow pictures or 3D pictures look alike?The tv convergence board have dead 2 STK convergence ICS and some or all of it resistors too.These parts on the tv convergence board,must be replaced to repair the tv convergence board to solved the tv convergence picture problems.The shop,will cost u like $300-350 for parts and labors.

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I have a samsung 47 inch rear projection w/self focus there is a continuos blue shadow around images is there a quick fix

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Check all cables,replaced all cables if more than couple years old.After that the same,ur tv have one dead color gun,require service.

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1 Answer

Images on tv are green sony 60 in projection sxrd-

If it's bright green with light lines from side to side the green gun is shorting out. You would need to take the front off and look at the neck of the tubes. See if all three filiments are working. It will be a dim glowing in the neck of each tube. If you have filiment voltage but no red gun you may have bad solder connections on the CRT modules but being it's a Sony it could be a bad green Tube. If the green gun is shorting out call around to TV shops in your area and ask them if they have a Beltron or BNK Picture Tube Rejuvenator. Sometimes the short can be cleared using the right test equipment. Ask them how much they would charge you to shoot the tube if that's your problem. If it's no Red it may be bad solder connections on the CRT modules. I hope this helps.

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Use Toshiba STK392-110T X 2 for exact replacement..........T.

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Verticle lines

I am woundering if the repair folks did the proper job and used the right IC's as alot of NON authorized shops will use the cheap aftermarket repalcement ICs and not even use any new heat sink compound. 4 repairs in 5 years is very excessive! I would not have called the same shop(s) to do the repairs. Put on the test scren on the TV set and see if the convergence is off. If it is make the shop replace them again for free or ask for your money back. Man what a rippoff that is. Good Luck and keep us informed of your progress with the shop and the repair.

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the unit needs the convergence ic's replaced and probably a couple of safety resistors.average repaire are about 300 from a tv shop

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