Question about ViewSonic VP920b 19" LCD Monitor

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Display flckers on and off

The monitor flickers on and off every couple of seconds. Sometimes it goes off and I have have to hit the power switch and the cycle starts all over again.

Posted by rosalind on

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Anonymous

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Are you able to test this monitor on another pc? This "might" be a graphics card problem as some Nvida cards have problems identifying certain monitors and continually referesh them. This could also be a sign that there is a power problem inside the monitor.

Posted on Aug 21, 2007

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Macbook and 24" display flicker when plugged in
MiniDisplay will probabely not support the Cinema's screen resolution...

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My LG 2353 monitor screen goes blank by itself. Sometimes it will go into sleep mode or sometimes my screen just blanks out and the power light stays solid red without flickering to indicate whether or not...
shaylane_195, Good description of problem! But you left out one or two key things to tell me. Age of monitor? Approximate total "ON" hours of use? Is unit covered by LG (Lucky Goldstar) warranty? You and only you can tell me if the screen is really BLANK, or is it only BLACK? Do flashlight test to determine true state of screen! Can you see very, very faint image of WIN-desktop holding bright flashlight near your black screen? This monitor works!!! You just need to fix the possible (1) "cold, frosty looking, thermally intermittant solder connection on the "internal switch-mode-power-supply/CCFL inverter board. Yes, your monitor along with many other CCFL back-lit LCD units of all brands also could have some BAD, swollen, leaky electrolytic filter capacitors installed on the SMPS/CCFL inverter board which will need to be replaced with new ones of higher quality. Get back to me, lmistyrel on aim. or do additional comment on fixya, after you do some reading in my and other fixya tech's profiles to discover all options you as consumer/user have open to you. Bye for now. 12fixlouie

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1 Answer

Screen flickering on and off.
I have the same problem with mine. I've kinda narrowed it down to it being the power supply in the monitor. was told it is about a $20 fix but we'll see

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Monitor keeps shutting off after a few seconds- hp dv4000notebook
You may have a defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp.
Connect an external monitor to your laptop and power the monitor up first then the laptop, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out
www.lcdparts.net

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budged electrolytic capacitor nearby high voltage transformer. 220microcarad/25Volts. apply fresh solder and re-connect lamps.

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1 Answer

Screen goes blank after a few seconds
Hi ,
The monitor flicker problem. The monitor when turn on will display image for couple of second then turn black. The monitor status led is still green. This will happen each time it is turn on. The symptom at appear to come from the inverter board.

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Dell monitor is flickering
If you have another computer, try hooking to it and see if it flickers on it too.
If you hit Ctl-Alt-Delete and choose Task Manager, does the box flicker there?.
Adjust the monitor ratio in the Display Settings/Display/ Display Adapter Properties, Monitor Tab, see drop down (increase screen refresh ratio to higher number).

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Viewsonic VA702B
Monitor going black after a few seconds can be caused by a faulty power supply or inverter. Some monitors have both as one unit.
Sometimes it is basic failed capacitors, After that then I would look at transistors.
The average monitor from 17 to 20 and sometimes the 22s have usually 4 bulbs in them. One bad bulb will also cause the inverter to not fire up.
Bad bulbs usually show pinkish tint, or flickering or are dark at center top or bottom of the display.
ebays bammbammfran

Jul 28, 2008 | ViewSonic VA702b 17" LCD Monitor

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Flickering screen and no display
thats the complaint of LCD inverter circuit...if u dont know to open it,then dont do any thing better thing is go to the nearest service center of toshiba and try to repair it if thats failed. u have to replace with a new inverter circuit.dont try to repair urself...thats all.

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2 Answers

RE:monitor goes black
Monitor going black after a few seconds can be causd by a faulty power supply or inverter. Some monitors have both as one unit.
Sometimes it is basic failed capacitors, After that then I would look at transistors.
The average monitor from 17 to 20 and sometimes the 22s have usually 4 bulbs in them. One bad bulb will also cause the inverter to not fire up.
Bad bulbs usually show pinkish tint, or flickering or are dark at center top or bottom of the display.
ebays bammbammfran

Sep 21, 2007 | Acer AL2017 20" LCD Monitor

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