When my tv is first turned on the screen is dark and there is a red and blue line in the first inch or so at the top of the screen. After a while the darkness seams to go away but the lines are starting to stay but appear to be in a very gradual arc at the top. The set is from the year 2000 and has never had any problems or any work at all done on it. Thanks
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Re: Dark Screen and red and blue lines
Dark unstable picture
1. CHECK C2P05 100 UFD 16 V OFF PIN 3 OF IC2P01 AND CHECK IC2P01 PART # 270P466020 (9-VOLT REGULATOR). BOTH ARE ON THE SIGNAL PCB.
you may also have a convergance problem. failure of convergance amps cause the arch at the top. the picture will look slightly out of focus. the cost of your repair may be $300.00 to $375.00
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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.
turn down the red screen control slightly the box is located behind the grille 6 knobs on it look carefully for the screen making on it for red do not adjust any other control best done in a dark room with no source in a video input if the tv will not auto align you have the control backed off to far
I had blue lines showing up on my screen, then the other night my screen started to flutter the blue, bright to dim and back. So I followed this link to resolve the blue lines and the blue flutter was resolved as well. Hope this helps.
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.
1. White raster with no
signal, washed out looking video with signal. Access the service menu,
"menu 0157" use the audio button to select "video chroma" adjustments,
use the video button to select item "68 - AG1", use the adjust button
to change the setting to 0, then press the enter button to store the
Sounds like you are describing retrace lines that could indicate that your CRTs or something in the drive circuits are bad.. Check the resistors on the CRT sockets to see if they are in tolerance. If they are try turning the red and blue screen adjustments down just a little this should take the lines away. You will however be needing service in the not to far future. Turning the screens down should help if the resistors check out. Let me know if you need anything further.