Question about ViewSonic VX900 19" LCD Monitor

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I noticed a post you made about the Viesonic VX900 and fuses

I'm interested in saving $80+ shipping on a new inverter board and don't mind soddering which item in the image is actually those fuses and do you think radio shack sells them? http://www.lcdpart.com/images/DAC-12C024MSS.jpg

can you email me at scgt1@hotmail.com I'm not on my computer and I've never used this site before LOL. found it while searching.

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I think you have bad CCFLs, (Cold cathode fluorescent lamps) they look like small flourescent lights and are used to light the screen. On smaller than 17" screens there are two, one on top and one on the bottom. 17" and larger monitors have 4 with real big ones having 6. If you attempt to change them be very careful not to crack the screen and remember the order of all the layers of the screen. The cost of the CCFLs along with the difficulty in doing this repair makes it not worth most peoples trouble....good luck

Posted on Dec 12, 2008

The fuses are on either side of the connector. They are semi transparent SMD chips. It's easy to see if they are flow or not, just look at them with a magnifier.

The problem with my monitor is everything works, I get a picture. But after turning the monitor on, the backlight almost immediately goes out, but you can still see the picture just barely.

Any advice on where the problem is? I'm guessing on the inverter board. No obviously blow parts. Capacitors maybe? There are to large electrolytic cap on the inverter one for each side.

Has anyone actually repaired one of these successfully? And what was the failed component?

Posted on Aug 28, 2008

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One of the tiny fuses in my Viewsonic VX900 monitor has blown. What is its part number, and where can I purchase a replacement? In addition, if I have to replace the entire inverter board, what is its...


I replace the surface mounted fuse with axial-lead fuse, PICO fuse made by LITTLEFUSE. You can try using a 1 Ohms 1/2 watt flame proof resistor in place of the fuse, if the resistor get real hot and burnt up then it may have shorted Transistors or transformer. You can get the number of the board and go to www.lcdparts.net to see if he has the inverter board in stock.
http://s807.photobucket.com/albums/yy352/budm/PICO%20fuse%20by%20Littlefuse/

http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VX900/
http://en.wikipedia.org/wiki/Capacitor_plague

Sep 03, 2010 | ViewSonic VX900 19" LCD Monitor

1 Answer

VX900 19 in. Flat Panel LCD Monitor: when i turn it on the screen is black....


You may have backlight inverter failure, check the fuse as shown in my pictures, you can also have bad backlight assemblies also, but check the fuse on the inverter bd first, verify that you do have 12v at the fuse.
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VX900/

May 16, 2010 | ViewSonic VX900 19" Flat Panel LCD Monitor

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

Hi, My screen blacked out, However If I press the on /off button, my current page will show perfectly for a half a second & gop black again. I can repeat this overe & over.


These have age related problems on the inverter board which lights the 4 bulbs
I repair these regularly through ebay.
Most common cause is a blown fuse on the inverter board, sometimes that is caused by bad capacitors or transistors. Usually it's just from age and heat.
Fuses are marked F1 and F2 and located on each side of the white large plug that feeds the board. These can be checked with continuity meter.
Fran

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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

3 Answers

Blown Fuse Value


See http://www.fixya.com/support/t179740-viewsonic_vx900_turns_second_shuts_off

The top left inset photo shows the two fuses circled, F2 on the left.

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no, Viewsonic has the part for sale 42.99 - free shipping. Easy to replace

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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.

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