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I am looking for a schematic of the pin-out of the power supply for a ViewSonic VG900 or VG900b monitor. I have a good power supply for the unit but the wrong connector on the end of the cord. Need to replace the connector, a 4 pin unit, but first I need to know which pin is hot and which is not.

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The two spaced furthest from each other are the +, the two closest together opposite the little nipple on the inside of the ground ring are the -.

Posted on Dec 14, 2009

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You will need to call the support staff at viewsonic. Be persistent, they WILL have to do some digging and that can affect thier allowable talk time as call center agents are always under the gun. Also be persistent bnecause alot of agents can be lasy and not want/feel like doing a bit of digging.

Posted on Nov 05, 2008

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1 Answer

Need power cable


That unit uses an AC adapter not just a power cable. The adapter is available here:

http://www.ccl-la.com/catalog/product_info.php?products_id=136

I hope this helps,
BuddyMc

Sep 10, 2012 | ViewSonic VG900b 19" LCD Monitor

1 Answer

We have a Viewsonic VG900b monitor that recently just started to show some very strange problems. First the colors have all gone dark, as if someone had turned down the Brightness all the way. I can still...


Check the two insertion ends of the power cable and ensure that they are well fitted in. Check your area power voltage range and ensure that the monitor complies with specification.

Make sure you are using the right and GOOD power cable.

Lastly, Unplug from the monitor from the system and allow to cool for a good 3 hours or better still, disengage it from duty for 1 day and start using it the next day.

Do you have enough ventillation there?


Don't forget to rate me and get back to me if this helps. Tnx.

Jan 10, 2011 | ViewSonic VG900b 19" LCD Monitor

2 Answers

Where can I get a schematic so I can replace


Hello,

We just posted the repair guide for this unit on our web site at:
www.ccl-la.com The repair involves changing 8 capacitors. On our site look on the monitor repair page 2 and then it is listed 3rd guide down, same as Westinghouse LCM-22W3. The power supply is DAC-19M009
If you have any questions just let us know at: tech@ccl-la.com

I hope this helps, If so please rate our solution.

Buddy
Corporate Computer
www.ccl-la.com

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1 Answer

Monitor displays then shuts off


Have you verified the video card in the computer with a different monitor? Does the going to sleep message come up prior th the monitor going dark? The bulbs are ok since you do see a picture for a short time. The voltage swing you see on the power supply is too large. It should always be 12 v + or- 10%.

Mar 28, 2017 | ViewSonic VG900b 19" LCD Monitor

1 Answer

I want schematic for power board No BN91-00182A of View Sonic monitor VA703M-4 and a componet list


tarkan271, Will you please let me know asap when you get a genuine copy of the ViewSonic schematic for the "switch-mode-power-supply" and "inverter" circuit. Don't you know that they are "top secret" documents? You absolutely must do a NEW comment here on fixya if you find some documentation!! My suggestion to you would be to call ViewSonic and ask them if you can get a .pdf file sent to your e-mail address of the schematic and BOM. Good freaking luck, guy!! 12fixlouie

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2 Answers

Viewsonic vg900b turns on, and turns off after 1 second


bad board inside do to heat clean your new one more offen. replace monitor.

Sep 08, 2009 | ViewSonic VG900b 19" LCD Monitor

1 Answer

Monitor flashing at startup


When the monitor is flashing, is the flashing coming from the middle and going up and done to fill the screen. If so, probably capacitors in the monitors power supply are leaking and need replacing.

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2 Answers

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The vga cable is a DB15, 3 ranks with male connector at each end,
(you can use a vga extention and add a little male to male adaptor at the female end to get finaly 2 males connectors)
And, the power cord is in fact an ac/dc adaptor, the replacement part is: 12b27-0428 (12v 5A 60w 4 pins) ...
just type de number 12b27-0428 on internet and you're on ...

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1 Answer

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Go into the NVidia control panel, create a custom resolution (for the ViewSonic VG2021m, you want 1400x1050, 60Hz), and test it.  When the test asks you if it looks ok and you click "yes", it *still* is not activated-- it is simply added as one of the resolutions available for the monitor, and goes back to the same setting you had before... so it looks like it didn't work.  But then, if you go under "Change resolution", you'll see your new setting is available there.  Choose it, and you are good.

It's working for me, on my T61.

Dan

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1 Answer

ViewSonic VG900 and Raritan Paragon KVM won't play.


hi there, yes, go to safe mode first, then adjust the resolution to the lowest and restrat the unit. then you will boot up for a lower resolution and adjust it to your desire resolution. note that don't set it to higher resolution it will go blank again. ty

Feb 18, 2008 | ViewSonic VG900 19" Flat Panel LCD Monitor

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