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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
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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.
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. Thanks
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.
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.
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. Thanks.
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!
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.
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.
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.
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