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Picture comes on and line screen turns blue and the picture does not come back on

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  • wunderkind Jun 09, 2008

    Picture comes on for about 20-30 second, then blue lines appear, then the screen goes entirely blue

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  • 8,617 Answers

Whats the model numberof your set? It sounds like the blue CRT is shorted if its a projection TV

Posted on May 10, 2008

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Set comes on with a blue screen with retrace lines,then shuts down. Turned down screen control on flyback, set stays on cannot control brill


The set is shutting down because the picture tube is been over driven, it is most likely the picture tube has a short in the blue gun, turning down the screen control drops the voltage to a safer level. The only other possibility is a short video driver and open feed resistor usually located on the video board on the back of the picture tube.

Feb 23, 2011 | Sony KV-32S40 32" TV

1 Answer

1. My Sony KP-57WS500 TV is turning blue after abut 3 minutesof operation. It stays that way for about 30 miunes and comes back with pictures again, but with predominatly blue color. 2. Sometimes the TV...


Sounds like the picture tubes are failing,common on sony. do you notice any thin horizontal lines? You mite get lucky and be able to adjust the voltages. Remove back cover and look inside to see which tubes are lighting up.The front panel below the screen will come off and behind it is a small access cover.remove it. there you will find the voltage controls (its a plastic square with 6 knobs). 2 knobs for each tube, 1 is focus the other is the voltage labeled "screen". they are marked so look closely. Green is always in the middle but sometimes they flip the controls for red and blue so pay attention to which you are controlling .slowly adjust screen voltages to see if you can get it to stay on. If you over do it those thin horizontal lines will pop up and the tv will shut off again. If you already have lines back off the voltage by turning knob to the left slowly until they diappear. If that seems to fix it but the problem but it comes back later, then the tubes are shot. good luck!

Jul 05, 2010 | Sony KP-57WS500 57" Rear Projection...

1 Answer

Lines, then no picture, then turns off


Remove Front panel look for screen/focus controls adjust them you have R/G/B for each tube ,you have screen drive controls as well as focus Start with red turn green and blue off adjust each one untill you have a black/white picture, If screen drives are to high TV will turn off.Also if STK ICs are bad TV will not come on there is a blue capacitor behind hori output Transistor that also burns out CK it as well.LET me know if any of this has helped you or if you need more information.

Aug 06, 2009 | Sony KP-57HW40 57" Rear Projection...

2 Answers

SONY TV MODEL # KP-65WV700 SER.# 9002706


Blue Gun is right side of TV if you look in TV from back side. Part number is as follows..

8-733-663-25 {CRT 07MVC62(B)-L} [KP-65WV700 ONLY]

Mar 13, 2009 | Sony Televison & Video

2 Answers

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.

Apr 11, 2008 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

Horizontal Lines and Blue Tint on my Sony KDP 57XBR2


ok,your porblem is very simple,reheat or resolder the main board your tv.

 

Oct 22, 2007 | Sony Grand WEGA KDP-57XBR2 57" Rear...

3 Answers

SONY KP57WV600-Turns Blue


yes ,it sounds like screen adjustment or focus block, should be around $200- $325 to repair.

Sep 08, 2007 | Sony KP-57HW40 57" Rear Projection...

1 Answer

The TV turns on and you can hear the sound but the picture is dark except for a thin line of blue dots in the center of the screen.


You have whats known in the biz as a cold solder connection on the vertical output IC or on the associated components. Not a job for the handi-man unless you know the issues with safty, and precautions to take with Hi voltage inside of tv sets. Shouldnrt cost much for the local shop to find your problem . Now on rare occations the poor connections are inside the IC and the IC has to be replaced. Good Luck

Jun 17, 2006 | Panasonic CT-25G6 25" TV

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