Question about Sony Grand WEGA KF50XBR800 50" Rear Projection HDTV-Ready Television

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Green Cloud show close to mid lower left center on most black screen

When the TV is turn on with black screen a green clouds show up and sometime depends on image its shows green mist cloud while viewing if background black and it's seen satellite or DVD

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  • 84 Answers

You will need the optical unit cleaned, if that does not resolve then the optic unit needs replacing

Posted on Jul 05, 2008

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Green and purple shadows in the left upper corner


Projection TV sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

  • Screen Looks 3D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - TV makes a chirping sound.
Problem #2 CRT Fluid has clouded over. Symtoms
  • Dull looking video
  • White looking video
  • Halos around objects
  • Red/Orange looking video

You can see some examples and find a fix here...

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Mar 05, 2010 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

Haze cloud picture that cut people head off...


the picture sounds like its blooming, you must turn down the screen control on the back of the fly-back transformer, or the transformer has gone defective more likely and needs replacing

Jan 27, 2010 | Projection Televisions

1 Answer

Screen turn green tv is 57 rear projection


Good Day,
It appears that you may have a green drive issue. Try adjusting the Sreen Control it is located in the front of TV.
1) Remove Speaker Grill (it just pulls off) start at one end, 2) Remove cover (5-6 screws), 3) Adjust control. The control is located on lower right side towards bottom. A small black device with 2 rolls of controls, adjust the center control on bottom row counter clock wise, until you get a black and white picture.(adjust with color control to min).
If this does not work you light bulb (CRT) is bad about a $750.00 repair.

Good Luck, Big Irish.

Dec 07, 2009 | Toshiba 57H83 57" Rear Projection HDTV

2 Answers

Blue haze/cloud in center of screen, slowly spreading


how to fix my problem Blue haze/cloud in center of screen, slowly spreading .but last time my lamp broken I order by my self and fixed now I have the blue color in my screen please let me know what is the problem may be I need to replaced same parts please let me know how to fix thank you

May 13, 2009 | Hitachi 55VS69 55" Projection HDTV

1 Answer

Blue dots and blue cloud. Sony 55" LCD


Sounds like magnetic interference,Do you have a speaker close to that corner?If so you need to relocate it a little farther away.

Jan 06, 2009 | Sony Grand WEGA KDF-55XS955 55" Rear...

1 Answer

Pikish Hue and curved colored lines


Sounds like the convergence amp are heating up and going out. you can look for the amps and see if there is a loose connection on the trace and if you can solder you may be able to save them or just replace amps with orginal. This is sometimes caused by moving set around, Set being so heavy it can not take a joult like the direct view sets

Aug 09, 2007 | Hitachi 50UX57B 50" Rear Projection...

4 Answers

SONY KP-57WV600 - Small green lines across the screen


According to several sites, the problem is with the convergence via the voltage on the color ray gun tubes that get out of adjustment. They are also known as retrace lines

Sony wanted between $150-$300 to diagnose and fix -- instead I was able to complete this repair in less than 15 minutes!
Since I had been through the routine once more and I was sure others are running into this issue,
1. All you need to complete this guide is one flat-head screwdriver and one Phillips screwdriver as well as a delicate touch.
2. Front shot of the television. Their are two screw holes on the front of the unit near the edge of each side right next to the speaker grille.
2_sony_projection_tv_front_screw_locations.jpg

3. Close up shot of the screw hold. It is covered by a plastic cover that has two tabs holding it in. Carefully pry them out with your flat head screwdriver. Do not apply too much pressure or you can break the tabs off. Once the covers are removed, unscrew the two screws with a Philips screwdriver.
3_sony_projection_tv_repair_screws_1.jpg

4. To remove the cover, pull from the bottom of the front case and rotate towards you. Once you rotate it out, the top will disconnect and come loose. Do not pull it off, as there are cords attached. (see picture) Loosen the cables attached with the twist ties and set the front cover to the left side.
4_sony_projection_tv_cover_off.jpg

5. With the speaker grille and cover removed, you now need to remove the wood panel to expose the inner electronics on your Sony HD TV. To do this, remove the four Philips head screws from the panel. Then, pulling from the right, rotate the panel off and the electronics will be exposed.
5_projection_tv_cover_guns_tubes.jpg

6. This is a picture of the inner electronics of your Sony Rear-Projection High Definition television. The little black box towards the front of the unit is where we will concentrate our time as it is the control for the voltage & convergence adjustment.
6_voltage_projection_red_blue_green.jpg

7. When focused in on the controls, you want to concentrate on the bottom row for the voltage / ray gun projection adjustment. The colors are labeled below and from left to right are blue, green, and red. Choose the one that needs to be adjusted and turn ever so slightly with your Philips screwdriver to remove the lines. In my case, the red just needed to be turned 1/8 of a rotation to be back in adjustment. Do not turn to quickly or abruptly or you could possibly damage your TV by varying the voltage too quickly.
7_red_blue_green_voltage_band_adjustment.jpgI hope this guide worked for you?

Dec 17, 2006 | Sony KP-57WV600 57" Rear Projection...

1 Answer

Vertical Green/Purple Lines on lower half of screen


I would contact RCA if the repair center dosent know how to troubleshoot this set. But I bet its an eeprom or ground issue. Contact RCA here at 580-634-0151 or At https://www.rca.com/secure/service/contactrca/1,,,00.html Good Luck

Jun 15, 2006 | RCA Scenium HD65W20 65" Rear Projection...

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