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

1 Answer

Sony kp51hw40 i don't have green color on picture,i tried color adjust ,and checked tubes, all 3 crts are on red,green and blue.can you give me some instructions please thank you

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert that hasĀ over 500 points.


    An expert who has answered 200 questions.

  • Expert
  • 375 Answers
Re: sony kp51hw40 - Sony KP-51HW40 51" Rear Projection Television Projection Televisions

Did you adjust the green screen control .

Posted on Oct 24, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

2 Answers

I took the back of the tv off and the blue lamp is not bright like the red and green. Could this be a coolant problem or lamp. I have the PT5492S Akai rear projection TV.

The blue is usually dimmer than the other two lens; what I would suggest is try to look into the lens with the set on; BE CAREFUL AND NOT TOUCH ANYTHING INSIDE THE SET.

If the red and green show a picture but the blue looks like a floodlight you have bad Glycol in the blue tube (common in these sets).

If all have a normal picture remember to wipe the lens clean at the top; do not try to take the lens etc apart.

Before you rate this information let me know what you find.


Aug 15, 2011 | Akai PT5492S 54" Rear Projection...

2 Answers

Turns on for 30 sec then goes bright blue and goes back into standby. turn back on it does it agian

This is blue CRT problem in tv as it is rear projection tv that has three CRTs red-green-blue inside to project color picture on front screen.
Blue CRT (tube) will be replaced to fix the issue and it is job of Pro because lots of adjustments are required after replacement of tube.
Local tv repair shop will help you for that.

Oct 02, 2010 | Sony KP-51WS500 51" Rear Projection...

1 Answer

Sony television,model number KP51HW40,serial number 9026465,the problem is turn on the tv within in 30second the screen come to blue but sound is coming,no picture

If you are saying it goes to a bright blue screen I can tell you what to try.

This model has a history of bad picture tubes--red,green and mostly blue.

The blue screen can be turned down and I can tell you how.

The way you will know if this is your problem is take the set to a unused video input--all you should see is video 1 etc in green; if you see blue with or without trace lines you have the problem.

Let me know what you find and if so I will tell you how to adjust the set manually to try to correct it.


Aug 17, 2010 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Sony kp51hw40 has green shadows and on edges in pictures and blue flickers on and off, tried all adjustments including screen, focus, and menu??? no luck

The CRTs in this model of TV had a problem with internal leakage. The blue was usually the first to show the symptom (flicker). Because all 3 CRTs are connected to the same high voltage source, when 1 acts up, the other 2 suffer as well. You need to replace the Blue CRT. However, this TV has some age on it... 1 tube will lead to 2 tubes, and 2 tubes to 3... They only last about 7 years. If you love the TV, replace all 3 (about $200 each). I recommend replacing the Red and Blue first, adjusting the geometry and convergence to the original Green. Then replace the Green, adjusting the geometry and convergence to the new Blue and Red.

Mar 15, 2010 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Faint lines show up when i get dark screens in movies

First check what color of faint lines comes then reduce Screen Volts in TV of that CRT (tube)
Take off lower front cover, speaker grille of TV, there you will see focus control block that has 6 control knobs, upper 3 knobs are focus adjustment of red-green-blue CRTs and lower 3 knobs are screen volt controls for red-green-blue CRTs. Turn screen volt control knob CCW to reduce screen volts of desired CRT.
Put TV on any free AV input so screen will be dark enough to adjust screen volts.

Aug 28, 2009 | Sony KP-57WS500 57" Rear Projection...

2 Answers

Screen goes all blue

if it is a KP65ws500 it is one of a group of sets made by Sony where all the picture Tubes(set has a RED, Green, and Blue Tube.) ARE BAD. Most of these sets had all three tubes replaced during a program Sony had. The tubes are NO LONGER AVAILABLE---the only way to get one is remove the tube and send it out for rebuild---most of these cost about 250-300 just for the tube.

The set is shutting down because when the screen goes bright blue it detects one of the CRT's(tubes) is pulling way to much current.

The problem with Replacing your Blue Tube is cost and----sooner or later the other two(red and green) are going to fail also.

best advice is maybe not to fix it.

I replaced dozens of the tubes in these sets when Sony had a recall and provided the tubes for free and paid for the labor etc.

I know I am not giving you good news but I do this here for free and if this has been helpful give me a vote here. Thanks!

Aug 20, 2009 | Sony KP-65WS500 65" Rear Projection...

1 Answer

TV picture is red.

Normal color picture is composed with 3 colors R-G-B (Red-Green-Blue). Picture turns Red means: Missing Green and Blue colors (many reasons: bad contacts, projector tubes dead, and other...). Try to give some "tabs" to diagnose ... I don't know what is the type of your Projection TV, how long you owned it, to have more idea.

May 15, 2009 | Toshiba 57H81 57" Rear Projection...

1 Answer

Sony Rear Projection TV - Red tube too strong

remove the front speaker assembly and the small access panel behind it and you will see a small square control assembly with 6 dials on it 3 control the color guns and 3 control the 3 gun focus. Try turning down the red control slightly they will be set up just like the CRTs red green and blue.

May 16, 2008 | Sony KP-57WS500 57" Rear Projection...

1 Answer

Blue hue

This might denote a problem with the CRTs (Red and Green). I would suggest having them checked with a CRT analyzer and if they are bad, having the technician perform a picture tube rejuvenation on all three CRTs. Now this will cut the tube life down to about 2 years, but if the CRTs are bad you really don't lose anything by doing this.

I hope this helps
Thank you

Dec 19, 2007 | Sony KP-51HW40 51" Rear Projection...

Not finding what you are looking for?
Sony KP-51HW40 51" Rear Projection Television Logo

Related Topics:

98 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sony Projection Televisions Experts

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1128 Answers


Level 2 Expert

103 Answers

Jason Harris
Jason Harris

Level 2 Expert

256 Answers

Are you a Sony Projection Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides