Question about ViewSonic VA703B LCD Monitor

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My viewsonic VA703b having this synthom , power button has LED on (green),but in black screen, must on/ off more than 15 mins then got display.... which component may cause it? Thanks.

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  • ViewSonic Master
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My viewsonic VA703b having this synthom , power button has LED on (green),but in black screen? This trouble maybe power supply or inverter boards is defective.
first you can test the voltage of the multr,and then check which part is defective.From Wisiny.com can find those parts
if you have any question,please let us know email:service@wisiny.com.thanks,we sincerely hope we can help you!
you can also check this boards whether suit you:
ILPI 023 490731400100R Viewsonic 790681400711R Power Supply Backlight...

Posted on Dec 18, 2014

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  • Master
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Look for bad caps in the power supply first just like the rest of failed VIEWSONIC as shown in my albums here:
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.
Service manuals: http://ftpkuban.com/FTP/Manual/ViewSonic/

Posted on Sep 04, 2010

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Posted on Jan 02, 2017

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http://www.givemefile.net/smanuals/monitors/viewsonic/va703b.html
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I have a ViewSonic VA703B, I need to get it working but I cannot get the back of. How can I get the back of.?


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12fixlouie
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Go to http://store.ramplus.com/fsfspopfrpos.html

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While this isnt an exact fix at work, you will at least be able to view your tv. We have one at work that would do nothing when you hit the power on button, just the usual geen led flashing. We pulled the cover off and found the bulging caps, more than likely from brown outs. But we also found that none were holding a charge. So we held the power button on for at least five min, after the led would stay on for about 30 sec and then turn off. We kept hitting the power button and the screen would try to come on. It finally did. After it did come one we can power on and power off aslong as we dont turn it off for more than 10 min. After 10 min of it being off we have hold down power button again and start the whole process again. So the main problem i believe is the caps arent holding a charge, to be able to kick the high voltage circuit on. We did not replace any caps but if we do end up changing parts will post what was changed and cost. Hope this helps

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