Question about Sony Grand WEGA KDF-42WE655 42" Rear Projection HDTV

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Color problem in corner

My screen is a different color in the lower right corner. Its a blue color like wash out. Any ideas.

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Do you have a speaker or fan or any type of electrical device around that area next to the tv? If so move it. Also either way yes or no turn the set off then let it sit 30 mins and turn it back on to degause the screen. If none of the above solve this get a deguassing coil and try manually degausing the screen. If this has no affect then the shadow mask inside the tube is warped and the tube would have to be replaced to correct the problem.

Posted on Sep 15, 2007

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Posted on Jan 02, 2017

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2 Answers

PT-47wx42 color problems


Hi,

This could be a heater-cathode (H-K) short in the CRT, a failure of a component in the chroma circuits or video output (driver board), or bad connections there or elsewhere. Don't panic - heater-cathode shorts in CRTs can often be worked around.
Note: before proceeding, it is a good idea to make sure that the screen is degaussed - else you could be attempting to track down problems with the wrong color!
Some simple tests can confirm or rule out other possibilities.

  • Compare the voltages for the video drive signals to the CRT on the little board on the neck of the CRT with the CRT both connected and unplugged. A schematic will help greatly in locating these signals.
    • If there is a significant difference especially on the bad color, then the CRT is a likely candidate. Try tapping the neck of the CRT GENTLY (with it plugged in and while viewing a picture) to see if it is an intermittent problem.
    • If there is no significant difference, you may have a bad driver or a problem in the chroma circuits.

  • Look for bad connection/cold solder joints, probably on the little board on the neck of the CRT. Use an insulated stick to gently prod the board and its components in an effort to induce/cure the problem. Look carefully for hairline cracks around the component leads.
  • You can swap components between two colors and/or test with an ohmmeter on that driver board to determine what is bad. The nice thing about color monitors and TVs is that there three copies of each of these components. Swapping and/or comparisons between these is an excellent diagnostic technique.
  • Another simple test: Disconnect the cathode for the full-on color from its drive. If it is still full-on, there is probably an H-K short in the CRT since the only way to get each color on the screen is via the cathode connection to the CRT neck board. If it is removed and there is still that color, the current must be taking another path inside the CRT.
  • Alternatively, interchange the outputs of the bad color with a good one by jumpering on the video driver board (on the CRT neck). If the bad color changes, then the problem is in the circuitry and not the CRT.
So you have to get a tech if the above method doesn't solve your problem and get it fixed..

Goodluck,
Please don't forget tor ate me as fixya..

Feb 09, 2008 | Panasonic PT-47WX42 47" Rear Projection...

1 Answer

Problem with JVC CRT TV (slim) with screen to have red color at the lower left (facing the TV) corner and a green color on the upper right corner of the screen. Sometimes while watching TV shows, the upper...


There is strong magnetic field around the TV. This may be due to the tower speakers or any portable radio kept close by.

Re orient the TV try switching OFF / ON at the intervals of 30 minutes. The built in auto de-gauser will correct the problem. In cable TV program if the picture is OK, nothing wrong in the TV.

Check with a different CD.

May 19, 2010 | JVC AV-21QMG3 21" TV

1 Answer

There is a blue color invading the screen across the bottom and right lower corner and a cloud of blue developing on screen


trye to change on tube of screen hawe som resistors and 1 of transistor tere you kan meger it and you will se wich 1 need to swampe it.

Jan 23, 2010 | Sony Grand WEGA KDF-60XS955 60" Rear...

1 Answer

Color wash at upper right corner of screen and lower left corner, color bleed. Resembles the colors of a florescent yellow or purple highlighter.


Projection TV sets have two common problems. The first is known as a convergence problem. Common symptoms are....
  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
The other common problem is cloudy CRT fluid in the lens.

Common Symptoms - you TV may have one or more of these...
  • Dull Video
  • Bright video - whiteish
  • Redish video
  • Halos around objects
You can see some example photos and find a solution here...

http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Nov 27, 2009 | Panasonic PT-61HX40 61" Rear Projection...

1 Answer

Blue color going up from down right corner toward center of scre


Your optical block is going bad. Contact sony support with your model and serial number. They sometimes warranty these even after the 1yr warranty has expired.

May 10, 2009 | Sony Grand WEGA KDF-60WF655 60" Rear...

1 Answer

Color distortion


Move any speakers or electrical devices away from the set. It could also be anything electronic or magnetic. Anything near the set that generates a magnetic or electromagnetic field could be causing the distortion.

Jun 04, 2008 | Zenith A36B41W 36" TV

2 Answers

Color Bleeding


Hi,

Service the LCD Panels and then try.

Viren

Mar 28, 2008 | Sanyo PLC XP45L Multimedia Projector

1 Answer

Monitor is black and blue light flashing


Boot from safe mode and try a different pixel/color arrangement. Obviously a lower pixel and color setting.

Mar 25, 2008 | Computers & Internet

4 Answers

Blue dots and blue color


my sony is 4yrs also it has blue dots on the left side from top to bottom and a blue blob on rt. bottom corner no longer under warr. please send repair solution.

Jan 12, 2008 | Sony Grand WEGA KDF-42WE655 42" Rear...

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