What is the default display settings for VA1912w

You probably need to install the drivers for this monitor. Try going here: http://www.viewsonic.com/support/downloads/drivers/?prod_name=VA1912w
and download and install the drivers for your OS (Vista, Windows 7, etc). You may need to then restart your machine, but this should hopefully help with your issues.

Did you connect the cable properly ?

Change input-source (e.x. VGA - HDMI)

What OS are you running? It is not hardware problem, but the driver problem if you are running WIndows 7, it will not know the resolution of this monitor if driver for windows 7 is not installed.
Try this; http://www.fixya.com/AnswerQuestions.aspx?ctgid=3&o=1
or just Google 'VIEWSONIC VA1912w DRIVERS'

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
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
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
Please post back what you find.
Please leave rating if it helps.

Viewsonic is known for having lines on their monitors. I used to see their display models do this at the now defunct CompUSA in the 1990s.

http://www.viewsonic.com/support/warranties/

I would check the above site to see if your monitor is still under warranty.
If not, then I think it's not economical to try to fix it and replacement is indicated.

In fact, I searched va1912w on the website at Viewsonic.com and came up with 'sorry, no pages match your search'

This tells me that it may not be a current product.

If it isn't current, it's likely it is not under warranty.

So, I would again say, buy a new monitor to replace this one. I don't think it's fixable economically.

check your power plug in ,,,or it may be a permanent problem of display failure ...

this might be the problem of backlight which is used to give away light for viewing of color watch carefully u might see the picture without color if it is though then change the backlight byy contacting ur nearest service center

I don't think it is a problem with the monitor or its driver.Please adjust the monitor settings on Windows by Right click-Properties-settings-Screen Resolution-1440*900.Now check whether you are getting the native resolution.

I think the problem is with the capacitor....you need to change the capacitor...

ViewSonic LCD (VA1912w) Went Blank

I am using this great LCD for about an year. But few times in the past my LCD didnt show up the display though the Green light was still ON, turning off the LCD and opening it again always solved the problem. But now My LCD completely went blank. Turning off/on didnt work at all now. I've tried couple of other tweaks mentioned on this site but they didnt work. I am just seeing a blank screen with green light ON. and ya theres a very low hissing sound coming from the LCD.

when u start sys press F8 KEY then go to safe mode and change resolution settings to 1024x768 or more
thern restart .