Question about ViewSonic VP930b 19" LCD Monitor

2 Answers

30 bad VP930B's may have green LED for an instant that's it. No display either.

I have about 30 Viewsonic VP930B's. All of them have no power led or anything. And the switch on the back is turned on. I figure if I can fix one I got them all. I'm an electronics tech but can't do much without a schematic or if components are surface mount. Viewsonic has a power supply for it but it's $350 and out of stock.

Posted by on

  • dekcarc Jan 08, 2009

    My VP930b had very similar symptoms. The power LED would blink green non-stop, or it would start working after being left on for a while, or it would just be completely dead. I found the 5V output of the PSU "bouncing" (hence the flashing LED) because those two 1000uF 16V caps were bad. I thought I'd add that, some weeks prior to this problem, a ton (20+) of stuck/lit pixels suddenly showed up, and now they're gone. That could be an early warning sign (I'm guessing the power supply output was getting "noisy").

    Note that the caps are high temperature types (105C) and should be replaced with the same. Higher voltage values are OK so long as the replacement will physically fit in place of the original.

×

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 286 Answers

Yes this is a very common problem on the VP930b. The fault is with the crappy CapXon capacitors (worst in the industry). As mentioned above, replace the 220uF@25V and 1000uF@16V capacitors. The other two never go bad. Make sure you replace the four above even if they look good. I would recommend using 35V and 25V respectively.

Note, if your monitor serial number starts with Q8H you may have a bad IC on the main board. Q8 often goes bad a few months after the capacitors do. If they are warranty they will have to be sent to Viewsonic or a local authorized service center.
If not warranty, you can solder a wire from the 3 pins on the left side of the IC to the four pins on the right side. One pin on the left side is the on/off pin for this IC and should be left alone. This will bypass the IC allowing +5V to the LCD all the time. However, if the monitor ever shows scrambled graphics after turning it on then turn it off using the main power switch in the back and turn it back on, it should be fine.

Posted on Sep 15, 2009

  • 1 more comment 
  • uligli Oct 01, 2010

    Hi Mergaroid, are you refering Myson MTV416GMV (U6) as the IC chip? Please be more specific with the pins, don't know which are the pins on both sides. Really appreciated your effort, thank you so much!

  • Al Savage Aug 31, 2014

    "Q8 often goes bad a few months after the capacitors do. If they are warranty they will have to be sent to Viewsonic or a local authorized service center. If not warranty, you can solder a wire from the 3 pins on the left side of the IC to the four pins on the right side."

  • Al Savage Aug 31, 2014

    Sorry for that bad quote. Mergatroid, Thanks! That tip about Q8, the 9435A, was spot-on, One jumper, and it was working. I really appreciate being the beneficiary of your help.

×

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

The power supply was failing due to various bloated capacitors, namely the 1000 uf 16v x2
470 uf 35v x2
220 uf 25v x2
Not all the caps were bad but when 2 or 3 out of 6 are bad, best to replace them all.
The monitors are still under 1yr warranty but VIEWSONIC didn't have any advance replacements, and although they sold me some boxes to ship the bad monitors in, they were the WRONG kind. $50 later in shipping costs they said they didn't have any of the right kind. They have the whole power supply replacement on their online store but says out of stock as well as 3rd party vendors. The electronics stores I went to were low to out of stock on 1000uf caps as well as some of the others. Sorry for the rant.

Posted on Sep 11, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My viewsonic VP930b-3 LCD monitor went too dark even I put the maximun brigthness, then I tried to use " Memory Recall" function in set up menu. The monitor will show up in good collor ( bright - shape) in...


Based on the specs it looks like this monitor is a CFL type and not a LED type. That means it uses a inverter to power the CFL tubes in the LCD. Usually these go bad after awhile.. usually the capacitors on the board run dry or go bad and need to be replaced. If your not good with soldering you might be able to find a board to replace it with.. more then likely given the monitor size "small" the inverter board is usually built-in on to the power supply board or mainboard and will need to be replaced together but some times comes seperate as it's own board. You might just consider replacing the monitor, LED monitors are pretty cheap now a days and more energy efficient.. and should last longer then most CFL type monitors because they don't use as much current and don't produce as much heat and LEDs tend to last longer with out the yellowing effect of CFLs. However it really comes down to build quality & component quality. While the most likely cause is a bad inverter other things can cause this too..like a bad mainboard sending voltage signal lower then normal to the inverter board.

Nov 04, 2013 | ViewSonic VX2235wm LCD Monitor

1 Answer

My monitor dont come on, and green light flashng, viewsonic vp930b.


If your ViewSonic LCD monitor has stopped working with a blinking green power button, It typically means that there is one or more failed capacitors in the monitor. It would be best to send the monitor in to Viewsonic for service or to purchase a new monitor.

Mar 11, 2011 | ViewSonic VP930b 19" LCD Monitor

1 Answer

My screen stopped working, all i see is black. When i plug the power cable into the screen, the screen's power led turns on and blinking every ~5 sec. What can be the problem?


Sound slike it is getting no video from your graphics card. Check the graphics card in device manager, and check the card is seated properly, the connections are good and that the drivers for your graphics card are there.

Jul 16, 2010 | ViewSonic VP930b 19" LCD Monitor

1 Answer

Vp2000s:Solid green LED with black screen


Please read below before DIY.
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, 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://www.badcaps.net
http://en.wikipedia.org/wiki/Capacitor_plague

Apr 17, 2010 | ViewSonic VP2000s 20.1" Flat Panel LCD...

1 Answer

The screen is black and power led is blinking green


I will assume that you have already tried it on another PC, just want to narrow down the problem before taking the monitor apart.
Most common failure in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, 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 and other monitors to get some ideas what goes wrong: 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://www.badcaps.net
http://en.wikipedia.org/wiki/Capacitor_plague

Apr 06, 2010 | ViewSonic VP930b 19" LCD Monitor

2 Answers

Flashing led on power button


Either the connection is bad, or the video card is not reading, or lastly the power supply is faulty which is quite common

Sep 23, 2009 | ViewSonic VP930b 19" LCD Monitor

1 Answer

Viewsonic vp930b-3


MY VP930b has the same problem.
It takes a very long time (5-10 minutes) before it becomes normal.

Aug 04, 2008 | ViewSonic VP920b 19" LCD Monitor

6 Answers

Viewsonic vp930b-3


Just as an FYI I have had the same problem with two of these units. Both purchased at the same time. First one went and would not come out of standby for a long period of time, then would not display on boot up. About 3 months after the first one started having the problem the second one was doing the same. Upon taking apart the second one I noticed two capacitors (250 micro farad, 25 volts) on the power supply at the connector going to the main board had a bulge. I decided to take the first monitor apart as well and the same two capacitors had problems. I replaced these with new capacitors and both monitors are now working like new. So in this case it was a power supply issue not allowing the monitors to wake up. This makes some sense since the problem started slowly at first then got worse and worse over time until there was no display no matter how long I waited. Since both were out of warranty I had nothing to lose. Hope this helps.

Jul 17, 2008 | ViewSonic VX2235wm LCD Monitor

Not finding what you are looking for?
ViewSonic VP930b 19" LCD Monitor Logo

1,378 people viewed this question

Ask a Question

Usually answered in minutes!

Top ViewSonic Computers & Internet Experts

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18330 Answers

Cindy Wells

Level 3 Expert

4801 Answers

Are you a ViewSonic Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...