Question about ViewSonic VA721 17" LCD Monitor

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Dismanteling monitor/replacing backlight

Got the ViewSonic VA721 need to replace backlight but cant get the damned thing open?

cant seem to get hold of a service manual either :(

Can anyone help?

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Re: dismanteling monitor/replacing backlight


Go to bottom of the page to download the PDF . It has complete instruction and pictures

Posted on Jan 12, 2008

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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

2 Answers

Backlight not working

Are you sure it is the lamps not the backlight/power supply problem?
If you are really good at soldering delicate components and very steady hands, you may be able to do it.

Jul 07, 2010 | ViewSonic VA721 17" LCD Monitor

2 Answers

My ViewSonic Monitor gets dim. Is there a replacement bulb?

Please look for bad caps (bulging top), please see my pictures and read below before DIY:

Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, 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.

Apr 19, 2010 | ViewSonic VA721 17" LCD Monitor

1 Answer

How to disassemble

There is ccfl(cold cathode fluroscent lamp) tube which is faulty therefore no light is there the ccfl tube operates on 600vac with 40khz-60khz so check 600vac to the tube if no voltage is there then check circuit and to open see any locks available there if no screw is observed take a smallest screwdriver (preset alligner)to open the lock

Mar 13, 2010 | ViewSonic VA721 17" LCD Monitor

1 Answer

I lost my installation CD for my ViewSonic VA721 monitor; can I get a download from the internet?

Yes here is a link to the drivers for your monitor>
Thank you for using

Feb 09, 2010 | ViewSonic VA721 17" LCD Monitor

1 Answer

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

2 Answers

My viewsonic va721 spontaneously took on a very greenish tint that will not go away. i had been connecting the monitor back and forth between two CPUs while I change over to a new computer. Can the green...

Make sure you did not bend any pins also make sure of that fact on both ends if not there has to be a solder connection inside that has faultered on you. The unit will need to be opened up to verify solder connection- Thanks

Aug 07, 2009 | ViewSonic VA721 17" LCD Monitor

1 Answer

Viewsonic va721 monitor

Connect the monitor to a different computer system (if available) to see if the issue is with the video card or the monitor.
Make sure A/C power cord is securely connected to the LCD display.
Make sure the video cable supplied with the LCD display is tightly secured to the video
output port on the back of the computer. If the other end of the video cable is not attached
permanently to the LCD display, tightly secure it to the LCD display.

Your backlight may be going bad, or the small controller board may be going bad also.

Nov 29, 2007 | ViewSonic VA721 17" LCD Monitor

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