Question about ViewSonic VX900 19" LCD Monitor

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Viewsonic VA912b black screen no ghost image even

You mentioned suface mount fuses on inverter  board: where and where? Also, how? and where do I get the fuses?
thanks so much, I'm "in the dark"
Rick

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  • scgt1 Aug 10, 2008

    Yea I've seen mention of the fuses being replaced also, but no one specifys. I really don't have $80 to spend on the board.

  • mandreas Apr 04, 2009

    I saw a board for sale for $25. Will this solve the problem or are there other components that will cause this I have a VA912b

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It was actually one of the fuses for me.

Posted on Oct 11, 2008

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Hey...Dude,
It's seems you guys need to replaced a couple of capacitors on the backlight inverter....not fuses. The caps look like a tiny battery, on top there were a + or Y mark on it.

Posted on Oct 11, 2008

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I have lenovo g550...my screen flickers in every 5minutes...


Failing Inverter An inverter, typically found inside a laptop computer, consists of a small board, which has impregnated electronic circuits stamped on it. Inverters look like thin boards about the of two sticks of chewing gum. The inverter and its bulb control the intensity of the liquid crystal display, which lights the screen monitor. The computer can control the output voltage of the inverter and either lighten or darken the screen. A special type of inverter can adjust the brightness of the screen by using an internal sensor to judge the room brightness, and then adjust the screen accordingly. Failing inverters give off some specific warning signs, which can be recognized by observing different screen characteristics.

Short Intermittent Display Upon turning on the laptop, the screen flashes on in the normal mode for a short period and then blinks to black. A very faint image appears in a dark background, which will be very hard to see almost invisible. After shutting off the laptop and restarting, the same mode occurs, where the screen appears normal for a few seconds then fades to black. This condition points to a failed inverter. To confirm this, plug in an operational external monitor; if the external monitor functions, the inverter has failed. b> Total Blackout with Ghost image b> The laptop turns on, as indicated by the power supply button, but the screen comes up black. The screen comes up black after restart. You might be able to detect a very dim or ghost-like image on the monitor. When you plug in a known functioning external monitor, the external monitor operates normally. This mode of display indicates a failed inverter. b> Long Term Periodic Operation b> With this failure mode, the laptop screen illuminates normally upon start-up and remains that way after several minutes, hours or even days, until it goes very dark again. Brightness controls or restoration attempts do not work. Most often, the screen will function normally with a computer restart, but will eventually return to black. Faint ghost images might appear, as seen in the total blackout mode. b> Dark With Color Variation b> Upon computer start-up, the monitor shows black or dark gray, accompanied by very faint images. The screen might have an intermittent color change, or remain on with a non-standard color variation, like pink or red. b> Auto Control Switch b> If the screen appears black, with no faint or ghost images, look for the lid switch near the back hinge. The switch, when depressed with a closed lid, shuts off the computer and monitor functions. Sometimes the switch becomes stuck in the closed position, disallowing the computer and monitor to turn on when opened. Pushing the switch manually several times can often free it up. If the switch tab has broken or jammed inside the case, it needs replacing. b> Loose Connection In this mode, the display looks normal upon start-up, but tapping the side case of the computer turns the screen black. More tapping results in the screen functioning normally then cutting out again. This condition points to a loose wire connection from the inverter to the LCD backlight lamp, or the video cable. The connectors can be accessed by removing the monitor bezel screws and pulling the plastic retainer off. Both connectors can be cleaned and refitted.

Feb 10, 2013 | Lenovo G550 PC Notebook

1 Answer

My ViewSonic 19" flat screen


Hello Sir, Hi, Most likely the inverter board, the back lamp and the power supply section that powers the inverter board are in question, these needs to be checked, since the problem is not permanent, like a totally no screen view the problem could be in any of the three I mentioned. I say it's better we wait for the failure to be permanent, to be easily diagnosed and fixed. We can always replace the entire three section, to have this fixed but may come out very expensive.

Feb 21, 2011 | Computers & Internet

1 Answer

The green power light comes on but the screen is black? What do i do?


More likely the backlight inverter board is bad, you need to check and see if the surface mounted fuse/fuses are good on the inverter board, also check to see if it has 12v feeding it, post a pictures for further help.

Jan 29, 2010 | ViewSonic VA800 17.4" Flat Panel LCD...

1 Answer

Have an old view sonic vx900 (~5yrs old). When you


Check the fuse on the inverter board and also verify it does have have 12vdc feeding the fuse. Worst case will be the lamps, power supply caps look OK?

Jan 18, 2010 | ViewSonic VX900 19" LCD Monitor

1 Answer

Screen suddenly does not display image just


There are two places to look for the problems, the backlight inverter board and the power supply, look for burnt parts, bad capacitors, etc.
http://en.wikipedia.org/wiki/Capacitor_plague
Please post back what you find.

Nov 19, 2009 | ViewSonic VA912BWB 19" LCD monitor

1 Answer

ViewSonic VA912b monitor fading out during boot


It is probably the power supply, or the inverters.

Similar problem with solution, though it requires you to know something about electronics.
http://www.badcaps.net/forum/showthread.php?t=6876&highlight=*va912*

Jun 12, 2009 | ViewSonic VA1912wb 19" LCD Monitor

3 Answers

Viewsonic VX900 blank screen


Here is a pic of the fuses on the inverter board for a Viewsonic vx900, you can visually inspect them as well if you do not have a volt meter. While visual inspection is not 100% reliable, usually when these are popped you will see the red line across them is black or broken.
82dd678.jpg

Dec 06, 2007 | ViewSonic VX900 19" LCD Monitor

5 Answers

19"ViewSonic LCD Monitor wont work at all !!


If you have the pc on and the monitor light stays green, take a flashlight to the screen. If you can see the images while shining the flashlight into the screen, they will be hard to see but they will be viewable, then its most likely the back light. The vx900 takes 4 bulbs and they are about $12 US each. Anyone who knows how to solder should be able to replace them.

Jul 02, 2006 | ViewSonic VX900 19" LCD Monitor

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