20 Most Recent ViewSonic VA721 17" LCD Monitor - Page 2 Questions & Answers

Try it with another PC and check the VGA cable to make sure it is not the monitor problem. If it still does not wotk, then it may have problem like bad caps as shown in my pictures here:
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VA721/

Basic LCD monitor troubleshooting guide:

http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you. Please post back what you find.

The backlight in your monitor is very slow to come on, and without the light you can't see (or only very dimly see) the display. The usual cause for this is failure of electrolytic capacitors in the inverter circuit that provides the lamp with power. The good news is that this is actually a fairly easy repair and many people do it themselves.

This video shows how to open a ViewSonic monitor similar to yours, and gives a good example of what bad capacitors look like. It also shows the soldering process if that's new to you.

According to one forum, these are the capacitors that need to be replaced in this model: C825 (1000uF, 10V), C903 and C910 (470uF, 16V), C824 and C828 (1500uF, 10V). The C numbers identify the part location printed on the board. The numbers in parentheses are the part's value. Capacitors are rated in microfarads (abbreviated as uF or MF on the part) and also have a voltage rating (the V number). New parts should have the same uF value, but get a higher voltage rating. They will not be stressed as much as the original parts, which is one of main reasons they went bad. 35-volt rated parts are not physically much larger. Do not use a lower voltage! Also, and this is important, these parts have polarity markings; you must be sure to get the plus and minus leads into the right holes when replacing the bad parts. You might be able to find the capacitors at Radio Shack (I don't know what they stock today) or at a local electronic repair shop. Online shopping is always an option.

Good luck with the repair, and thanks for using Fixya! If this has been helpful, please take a moment to rate it accordingly.

please try the LCD to other PC's, with this you can verify that the LCD is the one who is faulty.
if it works on other system without any problems, it might be your system or CPU is the one having problem
possible problem may reside in:
memory vga card(video card) processor(overheating) faulty motherboard OS(operating system)
the above list can be checked one by one, by a simple elimination process, meaning try other parts, and see what happens, for example, memory, you can borrow memory modules from others or if you have spare try it on the computer and see the results. run through the list until you eliminate or have found the real culprit
for the other items on the list: vga card - try another card, replace card processor - check system or cpu temperature(refer to your manual on how to)-check fans if operating-check for heat paste hardening(the grey material,like paste,see if it dried up,if yes put on new heat paste)
motherboard - you can check busted capacitor, burnt items or pieces, check for heating.overheating pieces or parts
OS - reinstalling the OS,

1) To unlock the monitor: http://www.fixya.com/support/r4554177-viewsonic_monitor_lock_unlock

2) I am not sure about the red light, are you taking about the power light or you are getting red tinting cast on the screen.

3) The monitor is old will more likely to have problem in the power supply by now due to bad caps and it can make the monitor act strangely. I am not sure what you mena by loos power cable.
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VA721/

I would not suggest you to try to take it apart since there are high voltages inside that can kill you.

Look for bad caps with bulging tops as shown in my pictures here: http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VA721/

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you. Please post back what you find.

It may hace dying caps in power supply just like the one I show here: http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VA721/

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: http://s807.photobucket.com/home/budm/allalbums Post back what you see inside so we can guide you further and it will help out other people in the future also.

http://en.wikipedia.org/wiki/Capacitor_plague Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Look for bad caps: http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VA721/

http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

just set the monitor on auto ..and it will adjust by itself..after that click right on the desktop ..than properties,,and after that settings in that window...here click advanced..and you will get some buttons on the top of the window..see which one s for the colors adjustments and complete the setting from here ..it is the image driver adjustment ..you can set the color management ..
also you can make thi sdirectly from the color settings in the image driver ..from clicking on the image icon on the tray of the task bar ..

When it does strange thing like this, you may want to inspect the power supply section.<br /> <a href="http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VA721/">http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VA721/</a><br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"><a href="http://en.wikipedia.org/wiki/Capacitor_plague">http://en.wikipedia.org/wiki/Capacitor_plague</a><span style="mso-tab-count: 1"> </span></span><br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Capacitors kit: <span style="mso-spacerun: yes"> </span><a href="http://lcdalternatives.auctivacommerce.com/">http://lcdalternatives.auctivacommerce.com/</a><span style="mso-spacerun: yes"> </span>he can make you a set of caps for you.</span><br />

It may have unstable DC feeding the logic board which can cause strange symptom.
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VA721/

Look for bad caps: http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VA721/

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, 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: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you

http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VA721/

http://elektrotanya.com/?q=showresult&megnev=ViewSonic&megnev2=VA721&kategoria=&kat2=all

Not our machanic, contact the company you dealt with.

Are you sure about the caps, bad caps can look normal also but can have high ESR.
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VA721/

Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, 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: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

Often problems with LCD monitors can be traced to bad capacitors. The following sites will help you identify if your monitor has bad capacitors, and how to replace them.

www.fixyourmonitor.com and http://www.youtube.com/watch?v=9Q6_TgNJvQw

Good Luck!

You need to set your PC video resolution to this monitor native resolution: 1280 x 1024 @ 60Hz.
http://www.viewsonic.com.au/support/manuals/files/LCD/Series%20A/VA721-1%20User%20Guide%20English.pdf

http://s807.photobucket.com/home/budm/allalbums

Look for bad caps (leaking/bulging) as shown in my pictures:
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VA721/

http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

This problem should not be only with your monitor, but also with your video card. You might have left one image sitting for long hours. There is no specific solution, but for Lcd users, you can try this. Leave the monitor off for few hours without any connection, maybe power chord or vga/dvi/hdmi cable. If this doesn't fix then the problem must be from your video card. You can try the monitor on another system to make sure, which one is the culprit. Your last choice is to reset the bios, to do this, remove the bios battery and leave it for few minutes outside (2 mins will do) and put it back. Reboot your system, this will fix your problem. Good luck. Thanks for using FixYa.

Look for bad caps as shown in my pictures: http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VA721/

http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

Look for bad caps as shown in my pictures, worst case can be bad lamps assemblies, see pictures of bad lamps album.
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VA721/

http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net