Question about ViewSonic VX910 19" LCD Monitor

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Viewsonic VX910 display goes off and on.

My VX910 is only 16 months old and the display has started to cycle on and off every second or so. The computer is ok; I did check it with another monitor. Is it worth fixing?

Posted by Jeff Miller on


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Motoi Bogdan

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Hello, This sounds like an invertor problem. Like I've said sometimes on fixya the LCD displays are very often confused with other types of displays and some people don't exactly know how one works. These "lcd" monitors are properly called TFT pannels (Thin Film Transistor). So, your display is composed of an area of small transistors, milions of them forming a matrix, 3 transistors for each pixel you can see on the screen. Each transistor handles one primary color (Reed Green Blue - RGB). However, they don't actually produce light or those vivid colors. They can only allow a certain wavelenght of light to pass trough it, blocking the other ones. They produce one color by blocking all others. However a TFT pannel doesn't produce light on it's own. If you power on a TFT pannel you'll see a black screen, altrough the pannel is working. Instead, your monitor uses a small fluorescent lamp, it gives the required light for your monitor to be bright and also for these transistors to filter. Now back on your problem. That small fluorescent lamp is powered on by an invertor circuit that is used to raise the voltage to the level used by the lamp. It's a common problem that these circuits may fail for diferent reasons. Power spikes over the mains, some mechanic shocks, poor design of the circuit itself, all of them can have resulted in your current problem. However this isn't a hard to fix problem. If I were to answer your question in the post - yes, it's worth fixing it. As I've said, the TFT pannel itself is working properly, you're having problems with that lamp's inverter. Simply take the monitor to a service center, ask them to check the inverter and power circuits and it will all be ok. This shouldn't be an expensive repair. Your problem may come from other reasons however, but the one explained by me before, is the most probable and common along this monitors. You may want to ask them for a price estimate before they actually repair your monitor. Just to be shure. I hope this will help in some way. Good luck and please feel free to ask further questions regarding your monitor.

Posted on Jun 11, 2007


andrew pester

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If you mean that the screen cannot be viewed because it goes dark, then the backlighting is faulty, and i don't think a repair is economical. Or if you mean the the monitor turns on and off and displays no signal, just check the vga connections, if there are no bent pins then there is an internal fault, again with prices of LCD monitors coming down, it's not worth waiting weeks for it to get repaired when you can pick up monitors cheaply.

Posted on Jun 11, 2007


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1 Answer

I have a ViewSonic VX910 LCD monitor. I turn it on and it comes on for a second then goes black. I did replaced all five capacitors in the power supply board, but it didn't help, still the same problem....

AllI can think of is that a tripler or inverter could be breaking down, causing the unit to go into auto
shutdown mode. Some devise is breaking down, and causing the unit to shut down.
Not an easy problem to troubleshoot unless you've got a schematic and tech skills.
Hope this helps

Mar 26, 2011 | ViewSonic VX910 19" LCD Monitor

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Monitor turns black after 2 seconds, Viewsonic VX910

Check the power supply first for bad caps, then check to see if you do have 12vdc feeding the the inverter circuits, worst case will be the lamps, see example of failed VIEWSONIC monitors due to bad caps:

Jan 21, 2010 | ViewSonic VX910 19" LCD Monitor

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My screen turned black and began flashing.

Kim, The LCD display requires WHITE light so you can see all the colors on the screen. Most BLACK screen problems will be a power supply problem internal to the monitor. I monitor is still under warranty, have Viewsonic repair it. Here are a few more options that could be available if unit is out of warranty. 1. Trade in for new widescreen display. Please note that the electronics technician at the store will evaluate your monitor and try to repair it for less than $10 in parts! He or she will keep it as a spare unit or sell your monitor for $40 - $60 to a buddy that needs a spare or second monitor. 2. Check to see if Viewsonic has a CASH+old unit swap-out program. They ship you a REFURBISHED same model unit w/ 30day warranty. Yes! They will REFURBISH your old monitor and ship it to another customer. But that's only if a swap program is in effect! 3. Check with a local TV/LCD monitor repair shop, to see if they refurbish LCD monitors with new or rebuilt "switch-mode-power-supply" / "inverter supply" / "cold-cathode-fluoiescent-lamps" . 4. Most costly option. Buy new display AND have your VX910 repaired and kept as spare unit! Before you do any of the above mentioned options visit (FYI) YOUTUBE and search for and view the longer (8-12 minute) video clips of "LCD monitor repair" and "LCD monitor disassembly" to learn what the most common causes of LCD BLACK SCREEN failure are and what parts are used to fix them. Also visit and , for more information. If your VX910 falls into the FAILED CCFL backlight catagory get back here to fixya and let us know what option you will persue. If this was helpful to you or someone else, rate this response on fixya. 12fixlouie by for now.

Nov 04, 2009 | ViewSonic VX910 19" LCD Monitor

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ViewSonic VX910 monitor has a power supply issue.

Your monitor have a bad condensator in the PSU.

The only thing to do is to replace the Power Supply Unit (very expensive, more than a new monitor) or if you have electronic tools, found and replace that condensator.(cheaper way...)


Have you connected your monitor with a new power cord ?

Best Regards!

Jun 29, 2009 | ViewSonic VX910 19" LCD Monitor

1 Answer

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You will need to replace the below failed caps.
2 - 1000uF @ 10V
3 - 470uF @ 25V
1 - 470uF @ 10V

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1 Answer

Iimj9 sonic tft - lcd monitor goes out after 3 seconds

You should remove power for a few min then hook up and try again.electronics sometimes need to be reset after any fluctuation in power. Good Luck

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VX 924

Is this a flat panel monitor? How long have you had it? What brand is it? Are you getting any type of display when you turn it on?

Nov 26, 2007 | ViewSonic VX910 19" LCD Monitor

1 Answer

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it is power problem pls show it service personnel

Sep 21, 2007 | ViewSonic VX910 19" LCD Monitor

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