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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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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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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I have a Dell Ultrasharp 1907FPV, it's a few years old. Whenever I start my computer, the moniter stays dark and the green power button does these quick flickers. Eash flicker cycle takes less then a...


You don't have a short-circuit. That would have blown the protections or even the monitor. Refer to the manual, that flashing light may be a code that tells you the problem. I don't think the repair would be expensive...

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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 cold start issue only as #2 monitor


The start up problem is common and will only get worse. Call Samsung as these monitors have a 3-year warranty. No receipt? They will accept your word regarding your purchase. I have two that failed exactly the same way. I called 1-800-SAMSUNG and they gave me the choice of an exchange pair sent directly to my house (requiring a temporary credit card deposit) or by having the exchange pair sent to the UPS store where I would swap out my bad units. No receipt. They merely asked me when I purchased it so they could have it for their records. Manufacture dates such as your (March '06) and a purchase of September '06 are not far fetched at all. .

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1 Answer

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You need to disasemble and check for dry or burn capacitors first then check for the transistors near the inversors.Good luck

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1 Answer

Viewsonic VG 900 displays briefly, then goes blank


What Usually causes these to go on and off quickly is one af a couple things.

Usually it is the powerboard not putting out enough power to run the video board and the inverter.

Sometimes it is the actual inverter board. I have seen a plain small fuse stop these cold.

Rarely, but it could be a bad bulb in the screen. Bad bulbs usually start dark in the middle, or they start off pink. They can also flicker while they are on.

If you can take it apart and have a dc tester, the problem may be able to be found.
I repair some viewsonics , mostly VXs series, but I have done a couple of these.

bammbammfran

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No sync means no video signal to the monitor. The rest sounds like a corrupted OS. This could be from a number of reasons, including a virus. If you have NORTON or MacAfee, Your open to a lot of attacks. Get AVG free, and use Mozilla instead of IE.
The reason the fans come on full speed is the MB senses a high temp on the CPU, until the bios fan control takes over after POST. This is normal on most systems.

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1 Answer

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The main drive motor has a relay switch on the side of it. The clicking and power flicker along with only the first couple of cycles are a good indication if a bad motor relay.

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