Question about ViewSonic VA721 17" LCD Monitor

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ViewSonic VA721 monitor

Screen black when on. If powered off/on screen will appear for a split second. Is this fixable? What could be the problem? Worth fixing?

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Re: ViewSonic VA721 monitor

This is only an educated guess based on my years of computer and electrinics experiance. I believe the problem is the AC inverter that supplies current to the monitors back light,it powers up and fails. the monitor is working but without the back light you get a blank screen.The problem is fixable, but the delema is that for a technician to troubleshoot and repair the problem may cost as much as replacing the monitor since the prices have dropped so much in the last few years.

Posted on Dec 23, 2007

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Hi! My Viewsonic VA721 LCD Color Monitor's screen is getting darker over time. I've had it for about 5 years. Is it just getting "old" and worn out or is there something I can do to correct...

It can be that the power supply is dying due to bad caps (or worn out backlight lamps) as shown in my pictures here:
It is old monitor so it may not be worth spending on it.
Please leave rating if it helps.

Feb 02, 2011 | ViewSonic VA721 17" LCD Monitor

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The power light keeps cycling on and off. and the screen flickers on for a split second.

Look for bad caps, shorted transistors, etc. See my pictures here:

Please read my guide and learn about bad caps and look at the pictures of failed VIEWSONIC and all other brands of monitors.
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for:
Post back what you see inside so we can guide you further and it will help out other people in the future also.

Basic LCD monitor troubleshooting guide:
Learn about bad caps: Capacitors kit: he can make you a set of caps for you.

Nov 10, 2010 | ViewSonic VA721 17" LCD Monitor

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I need a driver for my va721 monitor

ViewSonic VA721 VA721 Monitor Driver ... Login. Register ... Uninstall Windows drivers How to Uninstall Windows Drivers and why you need to know it

Dec 06, 2009 | ViewSonic VA721 17" LCD Monitor

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Viewsonic VA721 - Screen goes blank for second or two and returns

Sounds like its going to sllep too soon make sure you do not have it set in your video card settings. also try it on a diffrent computer. if that does not shore it up replace the acpi board

Jun 11, 2009 | ViewSonic VA721 17" LCD Monitor

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Screen dialoge analoge and turns black i have no credit card then i dont know how to pay for asistance

I'm assuming turns black and blue then turns off? First make sure your connectors to your monitor and back of pc are secure. But it sounds like your video card needs to be reseated.

May 24, 2009 | ViewSonic VA721 17" LCD Monitor

1 Answer

Increasing resolution higher than 800x600

the screen res is adjusted through windows not through the monitor.the pop up you speak of is only informing you the current screen res as set up through windows.

Dec 15, 2007 | ViewSonic VA721 17" LCD Monitor

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