Question about Scanport 821S 17" LCD Display Monitor

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Monitor problem have blue retrace lines on monitor always

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U can open the monitor and find the 1uf/50v and change it.

Posted on May 07, 2008

  • roney  trejeros
    roney trejeros May 07, 2008

    coldsolder the crt socket of the monitor.

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I have alot of blue lines about the semi bottom of the screen ! what should i do.


sounds like retrace lines caused by a bad blue CRT. But I would need the model number of your set in order to assist properly

Feb 06, 2013 | Panasonic Televison & Video

3 Answers

Z3 projector.3 years old. Blue tinge in one corner of projected picture. Grainy picture on dark scenes.


There may be some problem with your picture tube else try this that looks like retrace lines. Anyway, you should try to adjust screen pot not focus pot. Make sure you are turning blue screen pot (there are 3 focus pots and 3 screen pots) and do it slowly. If you turn it too much, it will affect your grayscale

Jun 23, 2008 | Televison & Video

1 Answer

3 vertical very thin lines on display how can i fix them


This is due to retrace and can due to higher screen voltage or a fault in the VERTICAL section.
Reducing the screen voltage will confirm this and if so there is a failure of a 10-20MFD/250 Volt capacitor.
If not a weak capacitor in the vertical section will show the retrace and replacement of the cacpacitor in this section must solve the issue.

Oct 01, 2011 | iiyama Vision Master Pro 514 22" CRT...

1 Answer

Blue wave across top, opened up, cleaned mirror and lenses, blew out dust in lower portion.


not a clear description... could be a blue retrace line(problem with blue picture tube) or blue convergence(defective convergence IC)

Oct 29, 2010 | Hitachi 43UWX10B 43" Rear Projection...

1 Answer

I have a KP-51HW40. Everything works fine but the screen stays blue. What could the problem be?


if blue picture tube is blooming with retrace lines? it's because it developed internal short. you might try to turn down screen on blue picture tube. always mark with fingernail polish so you can return to starting position. J.D.W.

Jun 24, 2010 | Sony KP-51HW40 51" Rear Projection...

1 Answer

How do we set the g2 voltage properly


turn blue black to off. turn tv to av mode. then adjust g2..until retrace lines appear on the screen.then decrease the g2 until the retrace lines disappear.

Apr 07, 2010 | Orion STV2763 27" TV

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Too much yellow does not adjust with normal drop screen adjustments. can i adjust the light beams.on my philips 50"


Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} 1. Turn the green screen control on the Focus Block until retrace lines appear and gradually turn it back
Until the point where you can see the retrace line disappears, just before cutoff.
2. Turn the red screen control on the Focus Block until retrace lines appear and gradually turn it back
Until the point where you can see the retrace line disappears, just before cutoff.
3. Turn the blue screen control on the Focus Block until retrace lines appear and gradually turn it back
until the point where you can see the retrace line disappears, just before cutoff.
4. If the screen still appears too bright after proper G-2 adjustment, you need to adjust the sub-bright adjustment in the service menu
control down until screen cut-off. (Service data Range is usually 21 to 25 in the Service menu, for Sony sets you first go to category "MCP2", & then adjustment item 01( "SBRT")= subright.
For electrical the focus, put on the screen a clear picture of your choice thru an input of the TV set from a DVD, then pause the playback of the DVD Look into each color and rock that color focus control back and forth (turn the control one way then the other way slowing down as the picture goes into the best focus. till the picture looks sharp do each color till they all look in focus. NOTE: it is best to look into each color tube to achieve the best electrical focus. For optical focus please follow the manual lens adjustment in the sets service manual
By Larry Dillon

Aug 27, 2009 | Philips 50P8341 50" Rear Projection...

1 Answer

Lines on the screen


Are they thin, white lines running east to west? If so, they are called retrace lines and indicate that the screen settings for the picture tubes is set too high or there may be a mal-function of the CRT driver circuitry. Try adjusting the screen controls which are located behind the front grill of the TV behind an access panel. Once you remove the grill and access panel, you'll see a small control assembly the has two sets of controls. Three for adjusting the red, green, and blue focus, the other, the red, blue, and green screen controls. To adjust correctly, put the TV on an unused input(dark, blank picture) and adjust until there are no visable retrace lines or color in the image.

michtech

Feb 14, 2009 | Panasonic PT-51HX41 51" Rear Projection...

1 Answer

Retrace line on monitor


To prevent serious damage and extend the life of your monitor you need to adjust the main brigthness control of it. it is of the LOPT/Flyback transformer inside of your monitor!

check also for cold SOLDER joints on the main pcb and also on the crt neck Board.

Nov 16, 2007 | Sony STYLEPRO CPD-E540 (Gray) 21 in.CRT...

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