KDS Visual Sensations 190i 19" CRT Monitor Logo

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Posted on Sep 24, 2017

Screen Flickers Hey everybody, if anyone can help i would greatly appreciate it. The screen will be good for a while but it will slowly start to flicker and then it will start flickering really bad. Any Ideas Monitor flickers then green verticle line on the centre oif the screen and then it dies temporarily, but comes back to life usually only for short periods of time

2 Related Answers

Anonymous

  • 732 Answers
  • Posted on Jul 27, 2010

SOURCE: display flickers, no image is

jglendenning, If not into soldering irons, solder, meters, and electronic repair of "switch-mode-power-supplys/cold-cathode-fluorescent-lamp ballast-circuits" then trade for new unit! Retrevo .com lists K717s as time to retire unit. Before you do anything check out the longer and more useful video clips at YOUTUBE that deal with "lcd monitor disassembly" and "lcd monitor repair" FYI so you at least know what is inside a typical desktop CCFL back-lit LCD monitor. 99% use same basic design and principle of operation no matter what brand of unit you have or will purchase in future!!! Hope this helped some. 12fixlouie

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budmrtn

Bud Martin

  • 11361 Answers
  • Posted on Jan 07, 2011

SOURCE: My monitor worked great for the period of 5 years

Bad caps can look normal but it they can have high ESR, but you should take some voltage readings first, it should have 5vdc and 12~16vdc when the monitor is plugged in but not turn on.
Post pictures of the caps also, many people told me the caps look OK until I see the pictures and they turn out to be bad. You need cap meter taht can read capacitance and ESR.
Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
Please post back what you find.
Please leave rating if it helps.

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Screen Flickers

MONITOR ABCs
The monitor is a hardware device which physically connects to your video card. The monitor allows information and current status be be visually outputted similar to a TV.
monitor.gif Like most TVs, the computer monitor has a CRT, or Cathode Ray Tube, which is found inside the computer monitor as illustrated in the above picture. The CRT is the main component and most expensive part within your computer monitor. Within the CRT are three electron guns, Red, Green and Blue. Each of these guns streams a steady flow of electrons, left to right, for each line of your monitor. As the electrons hit the phosphors on the CRT, the phosphor will glow certain intensities. As a new line begins, the guns will then begin at the left and continue right; these guns will repeat this process sometimes thousands of times until the screen has been completely drawn line by line. Once the phosphors on the CRT have been hit with an electron they will only glow for a short period of time; because of this, the CRT must be refreshed, which means the process will be repeated as explained above. If the video card's refresh rate is not set high enough, you may encounter a flicker or a noticeable steady line scrolling from the top to the bottom of your screen. If you are encountering this issue, resolutions have been described on our video card page.

MINIMUM RESOLUTION The size is an important factor of the computer's running resolution. When picking the resolution, try basing it off the monitor's size for best use. 13-inch 640 x 480 15-inch 800 x 600 17-inch 1,024 x 768 21-inch 1,280 x 1,024


Hope this works for ya/Please dont for get to vote.
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Flickering horizontal lines

sounds like a problem in the horizontal deflection circuit.possibly a solder problem. try re-soldering the horizontal transistor, line coils and yoke pins.
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