Question about Sony KP-51WS500 51" Rear Projection Television

10 Answers

Faint red lines in a curved arch like pattern

I have a 4 year old 51in Sony projection HDTV,when the picture is dark you can see faint red lines in a curved arch like pattern across the screen. The screen also has a red hue to it. Any ideas? Thanks

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  • Anonymous Dec 03, 2007

    I have the same issue how do I fix but mine has red and green lines

  • spiggz Dec 13, 2007

    I have a kp51ws500 sony tv. The tv id showing the picture with shadows and the displays are doubled such as two 2's for channel 2 etc

    Double images. Any help would be appreciated



  • Anonymous Dec 16, 2007

    same issues

  • Anonymous Dec 23, 2007

    We have the same model Sony and have had lines on it for about a year or so. I thought maybe it was the connection. I am glad I finally looked it up on the internet and my husband and I fixed it in 10 minutes. Our line were mainly blue and red and in a curved fashion. My husband didn't even have to do an 1/8th of a turn to fix it. Just touching the screwdriver to the red, and blue knobs fixed it up. Wish We would have done it sooner.. hopefully it lasts!!!


  • 26557 Jan 25, 2008

    I have the same problem with the red arching lines. I have a 4 year old Sony KP-46WT500. Does anyone know where I can find the adjustment screws on this model TV?

  • dans7282 Feb 14, 2008

    I have the exact problem with my Sony. Red arced lines in the dark areas. Please help I can,t find the Red adjust.


  • Anonymous Feb 16, 2008

    yes i have the same problem the red crt is out and it coist 187.40 from sony and that is the only color that they have i took it to a reapir center they wanted 350 a color there is one for blue, one for green and the repair guy said they are also going out at the cost of 350 what a joke the tv is only 5 years old

  • Anonymous Mar 09, 2008

    I had the same problem with my Sony KP-57WS500, but I fixed the problem using the posted solution. Saved some money. Thanks to all.


  • Anonymous Mar 17, 2008

    red lines arched and kida bold on the tv.

  • Anonymous May 18, 2008

    you can see all the colors in 3d in an arc

  • drlee1025 Jun 18, 2008

    having the same probelm as all of you,but mine also has no signal at the bottom left hand corner. With the red line in the middle of the screen. That gets bright and then dims down ot a lite red line.

  • Anonymous Jun 22, 2008

    the screen turns red.

  • Anonymous Jul 28, 2008

    I bought the TV 5 years ago and two months after I purchased it I had problems with it where they replaced the board and some of the lamps, a few months back I ran into the same problem and after they fixed it again, of course I only was reimbursed $94, I noticed that I had another problem with a faint blue line in a curved arch like pattern. I have spoken to Sony and am waiting for resolution.

  • Anonymous Sep 09, 2008

    same problem only green lines appear on screen

  • towin12 Sep 25, 2008

    Same problem arched red lines picture has very bad red tint and occasionally tv will suddenly turn itself off.



10 Answers

To access the focus block with the screen controls, remove the 2 plugs under the speaker grille. There is a philips head screw under each plug. Remove both screws. the speaker grill is now free. Pull the bottom forward and the grille will come off. The top is just held by tabs behind the screen bezel. Be careful as there is wiring to the grille for video input 2 and the front panel controls. There is a piece of fiberboard held on by 4 screws in the center which was formerly covered by the grille. Remove the screws and the panel and the focus block is right there. Each color is labeled for both screen level and focus. Adjust the screen control of the color producing the lines until the lines just disappear.

Posted on Mar 31, 2008


Guys I did this myself real easy. Just don't turn the corresponding screw too far. Only need to adjust it until the lines go away. Do it on a darker screen so the lines are more visible. I did the red 2 years ago and the green 6months before that. The blue lines are coming on my screen now and I've fixed it in 10 minutes. The TV is amazing.

Posted on Sep 10, 2007

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I got a similar problem with red lines on my Sony. I want to try this solution. Does anyone know how to take the front cover off in order to get to the CRTs?

Posted on Mar 08, 2008

Great solution on adjusting the lines here:

Posted on Jun 24, 2007

I have had the same problem, the CRTs are failing and will need to be replaced in 6-8 weeks. The CRT's are no longer in production and have to be located after market or rebuilt. Wrote SONY Electronics President regarding the quality on this model but received no reply. This was the last model of the rear projection type television they produced prior to DLP. Mine had aways been a lemon, great picture, too many shop calls. Get an extended warranty if possible. I'll replace mine with a LCD this year, not a SONY because of the expierence with this and Pres. non-reply.

Posted on Jun 14, 2007

I had the faint red and blue lines and a blue tint to the screen. Did the screen voltage adjustment for blue and red guns, worked like a charm. Took about 10 minutes and didnt cost me a penny! Thanks a lot!

Posted on Jun 04, 2007

I had the problem, I fixed as described above but it lasted less then a month and then the red and blue tube started at it again, with large lines on the screen. The power/standby would blink for 5 times again and again. I called service magic from an ad I found on this site and they sent a guy to fix it. He seemed familiar with the problem. He tapped the tubes, both the red and blue and each time he tapped, the screen would bleep. He said by tapping the tubes it cleared up some loose material in the tube and that this normally fixed the problem, but not for sure, sometimes it works, sometimes it not. now $134 later the picture is looking great Hope this helps JR

Posted on Apr 18, 2007

OMG! Thank you so much! I finally managed to fix the curved red lines on my Sony. I took the front of the TV off, removed the plywood cover, and turned down the power adjustment on the red (lower right hand knob). voula! no red lines!

Posted on Apr 18, 2007

I had the same probelm, the Sony tech huy adjusted the red Screen Voltage on the screen/focus block in the front of the tv. Just aslight turn of the screw and now it's all better... I paid $50. He said that occasionally it needs to be done, and that that eventually I'll have to do blue and green as well. Hope this helps, Good Luck Clark

Posted on Apr 18, 2007

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I have the same problem with my Sony projection TV, it has blue horizontal lines although mine over 4 years old, maybe even 5. I'll try your suggestions, thank You so much!

Posted on Apr 18, 2007

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Curved faint white lines like a rainbow

Go to this Blog. It "should " solve the problem.
Really, Really simple, do it your self solution !!
Instructions and pictures included :D

This blog covers many makes and models with many issues solved,
just with that one solution
Give it a try, it's free and simple :D
Had a similar problem , mine was like yours but with
different colors....fallowed the directions in that
blog....and it was fixed in 10 min :D
The Guy Ken, who posted it is a GOD !!!!!

Hope the blog helps you and anyone with this or similar
problems !


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Curved blue lines on screen.

You have a completely different problem. The screen voltage for the blue picture tube is slightly too high on your set. This will put fine lines in the background of the picture, called retrace lines. This is very common and easy to correct. Remove the front speaker cover and the access panel behind it. Look inside and you will see a black box with six controls, each control having a little white glue on it. This is the Focus/Screen block. Three controls are labeled Focus and three are labeled Screen. The screen control in the center is for green but I am not sure if the screen control on the left or right is for blue for your model. With the TV on, set it to VIDEO 1 but do not connect anything to the VIDEO 1 jacks. This will produce a pure dark picture, showing any faint lines in the background. Choose one of the screen controls and increase (turn clockwise) it slightly. If the blue lines do not get brighter it means you are turning the red screen control, so put it back where it was and choose the other screen control. When you find the blue screen control, decrease (turn counter-clockwise) it until just when the blue lines are gone. If you want you can check that the red and green screen controls are set to just below the point where their faint lines are visible. When done, replace the panels and your picture will be back to perfect.

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