Question about LG Computer Monitors

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Rolling horizontal line on screen

My new monitor has a horizonal white line that rolls up or down the screen at a pretty even speed. When the background is dark, it is quite obvious and distracting. When the background is white you cant see it. Is there any advice on how to change the settings so this doesn't show or any other fix?

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What was the reason for aquiring a new monitor?

Posted on Nov 24, 2008

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Unfortunately you can't.

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If it is still in warranty this will be covered.

If you are outside of your warranty then you will need a new monitor

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Hi,

Appreciate the "Ask Me".

I am assuming that you have more than just familiarity with electronic components and circuitry, the use of a DVM and a soldering iron. Further, that you have access to a service manual.

Width problem is basically insufficient horizontal deflection, then analysis would have to be in the horizontal section. Areas to initially focus on:
  1. 12V line and pin 29 of IC401;
  2. 110 V peak to peak at collector of Q403, if yes check Q 402 & 404 as well as T401;
  3. other components that affect the horizontal size are:
  • IC201
  • Q 405, 406, 407 & 408;
  • D409
  • L401
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

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You will need to take your monitor in for repair or buy a new one. I could get into the specifics about WHAT exactly causes this type of failure but bottom line is the same.

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1 Answer

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Sounds like you have a coincidental hardware failure. The reset button usually sets the monitor to factory default which is good in most uses. A rolling pattern on the screen is occasionally due to electronic interferrence such as a mobile phone in the vacinity. As you say your screen is fading completely suggests a hardware failure and nothing to do with your pressing the reset. If your monitor is less than 3 years old (standard screen warranty) I would contact the manufacturer and they may send you a new one.

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