Question about ViewSonic VA912BWB 19" LCD monitor

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Replacing backlight, but kind of lost (Viewsonic VA912b)

At the part where we removed the actual silver monitor casing from the black plastic casing, but we still cant find the actual slot for the back light.

Any sort of instructions would be a huge help. So far we have been winging it up until now.

a picture...
http://ecx.images-amazon.com/images/I/41D5H8RYQAL._SL500_AA280_.jpg

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First is this monitor still under warranty? If it is contact the manufacturer. If not the first thing to do is to get the manual. If you can't find the one that came with your monitor Google the Model# and brand name. Choose "downloads" there you should find manuals and info: if not use the support option and ask them for the needed diagrams and info that you need.

Posted on Mar 11, 2009

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Va912b monitor flashes on for a second then goes black, how can I fix it? I need immediate help.


Please see my pictures here if you are going to DIY repair: http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VA912B/

Common problem in LCD monitors, see other failed Viewsonic and other brands in my albums.
Please post back what you find so we can guide you further.
http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

Apr 19, 2010 | ViewSonic VA912BWB 19" LCD monitor

1 Answer

Va912b first cuts on with mostly blank but with broken strips of lines from top to bottom and have some together and some with blank seperation between them. then goes blank


joaye, First place to look would be the monitor's "switch-mode-power-supply" and /or the INVERTER circuit. When strange things start to occur with LCD monitor's w/CCFL backlighting, the first place to look would be the internal or external SMPS for the unit. You should be careful in your third use of the word "BLANK". Some monitors will be BLACK and not BLANK! Some will be both BLACK and BLANK. Read more Black screen stuff in my profile and you will understand WHY your unit is behaving like it is and some useful options you and other's like you have. Also visit www.ccl-la.com/badcaps.htm and www.lcdparts.com or YOUTUBE for videos on lcd repair or lcd monitor disassembly FYI DIY type stuff. I'm 12fixlouie on fixya.

Dec 05, 2009 | ViewSonic Computer Monitors

1 Answer

Screen suddenly does not display image just


There are two places to look for the problems, the backlight inverter board and the power supply, look for burnt parts, bad capacitors, etc.
http://en.wikipedia.org/wiki/Capacitor_plague
Please post back what you find.

Nov 19, 2009 | ViewSonic VA912BWB 19" LCD monitor

1 Answer

Viewsonic Va912b monitor


it seems that there is a problem in the lcd back light or may be in power supply section

Sep 12, 2009 | ViewSonic VA1912wb 19" LCD Monitor

1 Answer

My monitor(Viewsonic VA912b) flashes on and then goes to a black screen. Anyone know what is causing this?


Could be a few things.

It could be the resolution settings.
It could be that your monitor isn't connecting to your computer. In this case you would have to get a card for the monitor to plug into.
It also could be that it's not supported by the OS.

Jul 11, 2009 | ViewSonic VA1912wb 19" LCD Monitor

1 Answer

ViewSonic VA912b monitor fading out during boot


It is probably the power supply, or the inverters.

Similar problem with solution, though it requires you to know something about electronics.
http://www.badcaps.net/forum/showthread.php?t=6876&highlight=*va912*

Jun 12, 2009 | ViewSonic VA1912wb 19" LCD Monitor

1 Answer

Vx800 flickers when cold


I have repaired several Viewsonic VX800 monitors. The symptoms include a power light that flickers or flashed on and off or a screen that flashes on briefly or stays off. The problem is bad electrolytic capacitors on the power supply board. These bad capacitors do not look bad and do not swell but they do develop a high ESR (Equivalent Series Resistance). You need a ESR meter to check them. But if you have these problems, you should assume the capacitors are bad and just go ahead and replace them.
First you must open the monitor and gain access to the power supply board.
1. Remove the stand: It is held with 6 screws on the back. Also on the back are 2 black screws that must also be removed.
2. Remove the button bar from the front, bottom: It is pried off. This will expose the 2 screws holding the front plastic bezel.
3. Remove the silver plastic bezel from the front: First remove the 2 screws holding it, then you can pry the rest off. This will expose the 2 screws holding the screen to the plastic back.
4. Remove the screen and electronics from the plastic back: Remove the 2 screws holding it. The 2 speakers are glued to the plastic case. Cut the glue with a knife. The screen and electronics and speakers should lift out of the plastic back.
5. Remove the metal cover to expose the electronics: There are 2 screws holding the VGA connector and 2 screws holding the DMI connector. There are 9 screws holding the cover. These must all be removed. There is a black plastic sheet glued to the lower edge of the cover. It must be lifted. The cover should now come off.
6. Replace the bad capacitors. The power supply and signal processor are on the same board. It is marked VG800-2. The bad capacitors are surfaced mounted 100UF 25V. The bad capacitors are CM16, CM17, CM2 and CM165. The two most critical are CM16 and CM17, but they all read high ESR, so I just replace them all as long as I have them exposed.
Reassemble in reverse order.


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Oct 18, 2007 | ViewSonic VX800 18" Flat Panel LCD Monitor

6 Answers

ViewSonic VA912b (Back light with blank dark screen)!


the capacitors in the monitor give out have to see a technician

Aug 19, 2007 | ViewSonic VX910 19" LCD Monitor

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