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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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


If you know some electronics. Then open unit and look in the vertical curcuit for bad capacitor near vertical chip. This is happens because the heat break down capacitors. Also something a little easier the vertical height is set to high. Call the manufacturer and see if a company tech can guide through the procedure.

May 18, 2011 | LG Flatron F700P 17" CRT Monitor

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Blue verticle line is displayin

The blue line is most likely the result of your monitor's screen going bad. One thing you can try is disconnecting and re-connecting your video cables to make sure it's tight and has a good connection. This probably won't help, but it's worth a try. You may also want to connect the monitor to another computer to see if the blue line stays, or goes. If the blue line stays with another computer connected, the problem is inside the monitor. If the line goes away, you should replace/repair your computer's video card and/or cable. Otherwise, you need to replace/repair your LG monitor.

Mar 03, 2010 | LG Flatron L1750S 17" LCD Monitor

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My monitor suddenly always shows like 4 verticle lines near the edge of the right side of my monitor.Red, light blue, light blue and green to be exact. What made this happen and how can I get rid of it?

The lines could be caused due to the disturbance in its other words,look around the monitor to find if any other gadget like a Microwave Oven or Magnet is placed.
You can see if there is any leakage that ends up dropping water on the monitor.
you can see if the air cooler or conditioner or heater is directly blowing air on the monitor which could cause this to happen.

If you want to Isolate if the issue is really with the monitor or not, you would have to try out another monitor at the same location and observe for 24-48 hours.

Apr 24, 2009 | Acer Computers & Internet

2 Answers

Re trace lines in 14'' CRT

this monitor will unfortunately have to be replaced. the repair parts will take some time to order. try the troubleshooting charts on the LG website.

Jan 28, 2009 | LG Studioworks 45 14" CRT Monitor

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Retrace on screen

Need more info. CRT I'm guessing. Either you have adjusted the vertical size control way out because the screen kept getting smaller. Adjust the vertical size to eleminate the retrace lines and the start checking the vertical out put circuit. Check your voltages. Most often the porblem is in the power supply or closely related. Screen voltage and contrast circuits may also be involved. You didn't give me much to go on. Good lluck.

Aug 25, 2008 | Computers & Internet

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...

1 Answer

LCD TV - Vertical Blue line

My Lcd monitor has blue line? How can I solve this problem?

Nov 14, 2007 | LG Flatron L1750S 17" LCD Monitor

2 Answers

LCD monitor problem

what is the solution for this? my husband just turned his pc on when we got home and there are line blue lines running up n down in the black

Oct 11, 2007 | Computers & Internet

3 Answers

Horizontal lines are appearing and moving acrosss the screen of my View Sonic E50C Monitor...

What is wrong with your monitor is that the Horizontal section is going faulty, the lines you are seeing are the Horizontal Retrace lines, usually invisable in a working unit. It is often a faulty capacitor(s) OR a Diode breaking down.. in the area of the Flyback Transformer. Probably time for a new one unless ya can fix it yaself.

Jun 11, 2007 | ViewSonic E50C 15" CRT Monitor

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