Question about ViewSonic VX900 19" LCD Monitor

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Vx900 dispays for a second and goes blank.

What does the 100uf capacitor look like? Is it labled on the board or the capaciter itself. I have one guess. It is a tiny green module with solder pins at either end. About 3/8 of and inch in lenght. However it says f100 on the board.

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Is the vx922 worth fixing? my neighbour found it now i trying to fix it. wheres the capacitor, or the other thing to look at, as the screen goes black but button stays green..... i need diagram or simple play by play.

Posted on Sep 29, 2008

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2 Answers

V7 S20PD monitor goes blank after 1 second!


This is usually caused by one of the inverter transformers that drive the backlights, or the backlight itself. The capacitors should not be ruled out, to fix it will be expensive venture.

May 16, 2012 | V7 Computer Monitors

1 Answer

View sonic vx900 monitor - screen display comes on for a second and then goes dark; green light on monitor - all cables and power seem to be fine


It may have backlights inverter board problem, check the two surface mounted fuses, also can be bad lamps. Also verify that the AC adapter is putting out correct voltage with load.
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VX900/#!cpZZ1QQtppZZ20

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm/

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.
Please leave rating if it helps.

Jan 29, 2011 | ViewSonic VX900 19" Flat Panel LCD Monitor

1 Answer

The screen comes on for 3 seconds and goes off


This is most likely a backlight related problem. If the power light stays on after the screen goes off, then it is most likely one of two problems:

1) Something is wrong with your power/inverter board. Most likely you will need to replace bulging or bad capacitors on the power board. They will like have voltages between 16-25V and capacitances of 470-1000uF. You will need to disassemble the monitor, remove its power board, and inspect it. If you notice bad capacitors, you will need to desolder them from the board and solder on new compatible ones. This should solve the problem.

OR

2) If replacing the capacitors doesn't solve the problem, the problem may be with your backlights themselves. If you are able to test them, that would be best. Replacing them is a pain as you will have to disassemble the LCD panel itself to get them out. You will then have to replace them with compatible backlights of the same size, which you can salvage from similarly sized broken monitors.

Keep in mind that the suggested actions above are for individuals with some experiences in soldering and repairing circuit boards or LCDs. Also be sure to wear anti-static gloves or wristband and keep the monitor unplugged when performing the above stated actions.

Feb 28, 2010 | Computer Monitors

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

Monitor powers briefly then goes blank


Sounds like a Control board issue or a Power board issue... Might be blown Capacitors, in which case there is not enough power being supplied. Check to see if there are cheap parts on Ebay as replacements. If you don't want to go through the trouble sell the LCD itself for $150-250.

Dec 18, 2008 | Sony SDM S81 18 in. Flat Panel 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

12 Answers

Viewsonic VX900 turns on for second then shuts off


I had to replace a fuse(F1) on the inverterboard of my VX900 to get it back to life as fuzzytek sugested.

It was replaced by a normal "flat" fuse (for cars). Had no clue about the value, so I tried with 0,5A first. It blew right away. Next value I had was 2A, and it worked! (It might be too small, and it might be too big, but I think it is better to usa a "large" fuse rather than no fuse at all. :)

Some pictures from my installation:
481ef23.jpg

Aug 08, 2007 | ViewSonic VX900 19" LCD Monitor

2 Answers

Vx900 viewsonic monitor problem . Blank screen except for power off/on


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

May 25, 2007 | ViewSonic VX900 19" Flat Panel LCD Monitor

2 Answers

PC starts fine, then the montor blinks and no display. light stays green


This is most probably cause by one or more Faulty Electrolytic Capacitors, I find these are the MOST commonest form of "Fault" in these LCD's TFT's units. I ususally simply replace "On Spec" all High Value Electros, in fact ALL Electro's are suspect and often I just "Shotgun" and replace 'em all. Usually fixes all problems. Always use High Temperature Caps. Try this as it is a common problem I find a lot. Good Luck.

May 24, 2007 | ViewSonic VX900 19" LCD Monitor

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