Question about ViewSonic VA712B 17" Flat Panel LCD Monitor

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VA712b - display disappears within 5-10 seconds. Recovers for short time by PC reset or monitor power cycling.

I am an experienced hardware engineer, working on DTV projects for the last 7 years. I have a 17" LCD monitor Viewsonic VA712b (Model number VS10901, S/N PX7062700927), which I purchased in California several years ago (the warranty is not valid any more). Since yesterday the display disappears within about 5-10 seconds. Playing with the VGA cable does not recover the display. The display appears when I reset the PC and by toggling the monitor state to STBY and back to ON. In both cases it disappears after short time. I verified that this is a monitor issue, as it happends when the monitor is driven by either my PC or my laptop. I also disconnected the AC input to the monitor for 2 hours, but the problem was still there when I turned it on again. 1. Can you identify the problem by the above description and suggest a solution? 2. If not, please provide me with instructions for openning the cover so that I can access the electronic boards and maybe identify bad solder or damaged part. Thanks, Dov Porat.

Posted by Anonymous on

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

SOURCE: DVI connection fault

I had the same problem, you must call Viewsonic to change your screen. The DVI input on the screen is dead.

Posted on Aug 03, 2008

bammbammfran
  • 159 Answers

SOURCE: Viewsonic VX910 powers on, screen displays for 1 second then turns off

Blinking on and off is not always a capacitor issue, it is usually caused by faulty transistors at the high output transformers that light the backlights. Crappy board design ! But fixable in most cases.

Posted on Aug 10, 2008

  • 3 Answers

SOURCE: Viewsonic VX724 LCD Monitor

I contacted ViewSonic and they agreed to fix the problem as a warranty repair. Evidentially they're experiencing the same issue on many of these monitors. I had to pay for shipping to their Walnut, CA facility, they'll fix it and pay return shipping. Since it is considered a warranty repair, I think they should've paid for a round trip ticket. I don't want to sound like a cheapskate but it is a warranty repair and the shipping charge was $98.00. Ouch! Cheaper than a new monitor I spose, so I'm thankful for that. So those of you with this problem might consider contacting ViewSonic to see if they will repair this on a recall "like" basis if your warranty is up. If it isn't up yet, by all means send it back to them and make them fix it!

Posted on Sep 12, 2008

cashmerekay
  • 2 Answers

SOURCE: Viewsonic VE175b Monitor Powers Up Doesn't Display Windows OS

Hi; I had the same problem. I know that sometimes devices require you to perform some type of '10-30 second' "hold" of one or some of its buttons in order to 'reset' the device, so to speak. So, having said that, try this:

1) Turn your monitor off (no green light) but leave it plugged in.
2) Leave it off for about 10 seconds.
3) Hold the [2] button on your monitor (the one to the immediate LEFT of your monitor's POWER button).
4) While holding the [2] button, now press and HOLD your POWER button.
5) Wait for your image to appear and STAY onscreen for about 5 seconds, then release both buttons.
6) Your monitor should retain its onscreen image.

Hope this helps! Good Day to all!

Kelvin W.

Posted on Dec 18, 2008

MrDallasIT
  • 91 Answers

SOURCE: Power light blinking on and off

You will need to replace the below failed caps.
2 - 1000uF @ 10V
3 - 470uF @ 25V
1 - 470uF @ 10V


Posted on May 18, 2009

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1 Answer

Display not stable


the root cause of this problem is the inverter which light up the screen.you can replace the inverter or you check for shorted transistors and replace them

Jun 23, 2013 | Computers & Internet

Tip

Chevrolet service light 1991-01


Camaro

1998-01

To reset the "OIL CHANGE" light, press and hold the "TRIP/OIL RESET" button on the instrument panel for 12 seconds. When the light flashes and then goes out, the system is reset.


Corvette


1997-01

To reset the monitor after an oil change, turn the ignition on. Press the "TRIP" button so that the "OIL LIFE" percentage is displayed. Press "RESET" and hold it for two seconds. The word "RESET" should appear on the monitor, then "OIL LIFE 90%".


Impala,
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2000-01

Turn the ignition to ON without starting the engine. Fully press and release the accelerator three times within five seconds. If the CHG OIL SOON lights two times, the system is resetting. Turn the key to OFF, then start the vehicle. If the CHG OIL SOON light comes back on, the system has not been reset, repeat the procedure. Follow this procedure to reset the GM Oil Life System using the DE 100 Series Radio. Turn the ignition to ACC or ON and the radio off. Press and hold the DISP button on the radio for at least five seconds until SETTINGS is displayed. Press the SEEK up or down arrow to scroll through the main menu. Scroll until OIL LIFE appears on the display. Press the PREV or NEXT button to enter the submenu. RESET will be displayed. Press the DISP button to reset. A chime will be heard to verify the new setting and DONE will be displayed for one second. Once the message has been reset, scroll until EXIT appears on the display. Press the DISP button to exit programming. A chime will be heard to exit programming. A chime will be heard to verify the exit.


Impala,
Caprice


1994

To reset the "CHANGE OIL" light, turn the ignition switch to the run position with the engine off. Access the reset button on the end of the instrument panel by the fuse block. Press the switch and hold it for at least 5 seconds.



Lumina,
Monte Carlo,
Impala,
Caprice


1996-00,
1996-99,
1995-96,
1995-96

To reset "CHANGE OIL" light, turn the ignition switch to the run position without starting the engine. Fully depress and release the accelerator pedal 3 times within 5 seconds. The light will flash and go out.


Corvette


1990-96

After an oil change, or when "CHANGE OIL" appears on the Trip Monitor, with the ignition on and engine off, press the "ENG MET" button (located on trip monitor) once. Press the "ENG MET" button again within 5 seconds. Within 5 seconds, press and hold the "RANGE" button (1990-1994) or "GAUGES" button (1995). The light will flash. When it stops flashing and goes out, the system is reset.


Chevrolet Suburban,
GMC Yukon XL,
Chevrolet Silverado,
GMC Trucks Sierra


2000-01,
1999-00

Turn the ignition key to the RUN position. Fully push and release the accelerator pedal 3 times within 5 seconds. If the CHANGE OIL SOON light flashes 2 times, the system is reset. However, if the light comes on and stays on for 5 seconds, the system did not reset. Repeat the procedure if the system does not reset.


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1991-93

To reset the "CHANGE ENGINE OIL" message, turn the ignition key to the run position. Press and release the accelerator pedal three times within 5 seconds. If the light flashes for 5 seconds, the system is reset. Repeat procedure as needed.















on Dec 07, 2009 | Chevrolet Camaro Cars & Trucks

1 Answer

Hi there, the problem that I am experiencing with my VA712B is also a BLACK SCREEN. I turn on the computer and the picture appears fine for about ONE SECOND, then turns black and I am unable to see...


It does the same on another PC?
More likely to be caps failure in the power supply section just like the VA912 (19" version) and the rest of Viewsonic as hswon in my albums.

If you are going to DIY and already try the monitor with another PC, 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 SAMSUNG monitors to get some ideas what to look for: http://s807.photobucket.com/albums/yy352/budm/
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 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
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.

Dec 24, 2010 | ViewSonic VA712B 17" Flat Panel LCD...

1 Answer

Is there a reset procedure for the VA712b?


Only resetting to factory default not resetting he EPROM. What is the problem with the monitor?
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 VIEWSONIC 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

Jun 19, 2010 | ViewSonic VA712B 17" Flat Panel LCD...

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If you like we can do this with our screen sharing service. see my email in my profile for connecting with our team.

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