ViewSonic VX922 monitor - black screen - green power light flashes

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viewsonic vx922 is life time warranty an prob all other monitors aswell . it had it written on the website where i purchased it from an the box it came in.


hope this helps
if you need help ask here
an be carefull where you hold or pick up the board from it might still have voltage (can someone correct me on this about that large capacitor if it holds some voltage)







 
Thanks jroc8201 for the screenshots and the notes you added to them. They really help.

I posted a youtube video above which can also be very helpful for anyone trying this. :)

BTW, you said you have a Q20WB. But are these capacitors standard in all/most viewsonic monitors? I have a VX922 monitor.
 


I have a 22 " and i also have the vx922 which is 19"
Id like to try those smd electrolite capacitors that are used on the new motherboards.


Tomim ?????? sorry dont understand an dont know what language that is
 
Ive had my vx922 for about 3 years now, has worked perfect until about 2 weeks ago. started doing the green flashy.

sooo i pulled it apart, replaced the 470µF capacitors and now it works fine. just some old capacitors, folks...
 


Thanks Ian for the part numbers. I was having trouble finding the exact matches in UK.

If anyone wants to find them in other stores, then Manufacturer part no. were:

3 x 470uF 25v
Panasonic - ECG: P13124-ND
Rubycon: 25ZL470M10X16

2 x 1000uF 10v
Panasonic: EEUFC1A102
Nichicon: UHE1A102MPD6

1 x 470uF 10v
Nichicon: 493-3017-ND
Rubycon: 10ZLG470M8X11


Edit:
Danggg, I can't place order with Farnell since it has to be minimum of £20.00 plus £5.99 handling charge lol! So how did you pay only £3.42 or did you purchase something else as well to make up to 20 quid?

And that digikey site has £12.00 shipping cost since they will be exported from US.

Anyone know anywhere to buy these capacitors without having to be forced to place a minimum order value or too much delivery charges?
 
Nevermind. I couldn't wait any longer and ordered the following from uk.rs-online.com:

5 x 470uF 25V (EEUFM1E471)
5 x 470uF 10V (EEUFM1A471)
5 x 1000uF 10V (EEUFM1A102)

(they come in packs of 5)

for a total price of £5.03.

There would have been about £5 delivery charge but I opted to collect the items from a local store near me.
 
SUCCESS!!!

After collecting the capacitors today that I mentioned in my previous post, I came home and dismantled my monitor right away. I had seen the screenshots and the youtube video so had a good idea of what to expect.

Opening the back cover wasn't too difficult, although I had to use some considerable force and loud impact sounds were heard when each of the retainers were unhooked. I had thought I had broken them, but I checked after removing the cover, and they looked normal.

After getting to the bottom of the power supply unit, I noticed that both of the 1000uF 10V capacitors were Panasonic ones already (same as the ones I had ordered). And on the bottom of the circuit board, they showed that there was manual soldering on them. Their tops were flat and looked perfectly fine to me, while all other 4 CapXon capacitors had a slight bulge on them.

Now since this was a refurbished monitor which viewsonic had sent me (the first one having similar issue 2 years after purchase), it seems that they had replaced those cheap CapXon capacitors with good Panasonic ones. The monitor wasn't my own original one however, since they delivered one and picked up my old one in the same delivery trip... so it must have been someone else's who had returned it to them and had similar issue.

Anyway, I left the two 1000uF 10V capacitors in there since they looked good and were also of better quality than the cheap standard CapXon ones that come in the monitor. So I just replaced the three 470uF 25V and the single 470uF 10V capacitors.

Putting everything back was a breeze. I turned the monitor on and wooooowwww!!! Monitor turns on first time without a problem!!!

I didn't get any loss in image quality which a couple of people have reported here. Maybe you guys need to re-check the values of capacitors again, the polarity in which you soldered them (which is marked on the board - shaded area is negative) and whether there is any solder touching adjacent connections.... other than that, there shouldn't be any other issues which should give adverse effects.

Thanks to everyone who posted their success stories and tutorials, which encouraged me to repair my own VX922 monitor for £5.00. :lol:

I could have done it for half-price, since I didn't need the relatively expensive 1000uF capacitors. I only needed 4 capacitors from the 15 that I ordered so I have a lot of spare ones. It would have helped if I had opened my monitor before ordering and checking which ones were good and bad, but I could still manage to use my monitor if I messed around with it's buttons so didn't want to open it yet.

When I first started this thread, my solution was simple. To get an RMA and let viewsonic deal with it. So if you are still under warranty, take that path.

But as you can see, I am back 2 years later and I am out of warranty and had to repair it myself. So if you like your monitor and it was looked after well and doesn't have any dead pixels, I would repair it myself. You never know what monitor viewsonic might send you if you RMA it.

Thanks to everyone once again. :)
 
Another VX922 saved!! Thanks to all who have submitted the answers here I hated the thought of having to dump this monitor....Now it's like brand new :bounce:
 


Thanks for the offer, would you please send me the ViewSonic VX922 service manual? (If this is too much trouble, if you could send a scan of the relevent schematics and diagrams, that should be fine)

I appreciate your help.

- JD
 
I replaced 1 swollen 16v 1000uF and bingo!!!

Never have I been so impressed with the power and helpfulness of a forum!!!!

Cost me 56 pence from Maplins and thanks to the instructions on here - job done and around £100 saved from not buying a new monitor.....

Respect chaps.....!!!!!!!!!
 
Just wanted to post another success story! I picked up all the parts I needed at Sayal Electronics in Toronto, Ontario for $5. I opened up my monitor casing and found that all of the caps were blown.

I had never used a solder pencil or solder gun before, so I was a little bit clumsy getting everything done properly, but in the end it worked out and I am using my vx922 again!

A few tips from someone who knew absolutely nothing about circuit boards:

1) Use a Solder pencil, as the solder gun was just too big and awkward.
2) Use very thin solder, too much of it is a bad thing.
3) Make sure none of the solder ends up on the circuit board and crosses any of the circuits, this can cause them to short out. (This happened to me, and I had no idea what was wrong until I read up on it, talk about stressful!)
4) Removing the casing really was the hardest part as I was afraid to damage it... but its just the back of the monitor, don't worry about it too much!

What some others have said is true, if you are reading this, you CAN do it.
 
I'm a programmer/equipment coordinator for a county elections department. I'm kind of the techie guy for the group. The county has its own IT department but I do a lot of the IT type stuff for our group. Been here for about a year. In 2006 they bought 5 of these Viewsonic VX922 monitors and over the past several months all but one of them has started having problems. A couple years ago, one of them stopped working and was replaced with an older 910. All 4 remaining 922's have been doing the flashing green light with a black screen on and off since around the end of 2009. Tuesday, election day for the primary run off, I was out making my rounds at the different voting locations and one of the girl's monitors here wouldn't come up with any screen so they asked one of the IT guys that was here for help. I have always been able to get that particular monitor to work eventually by pulling the power and letting the computer boot then putting power back to the monitor and it eventually would work. The IT guy basically said it was dead and pulled one of our spares out and hooked it up. Threw the 922 in his car to take back and dispose of. Long story shortened, I tried to get another 922 that I had pulled off several months ago when it just wouldn't work, to work on a laptop and it still wouldn't give a picture. Yesterday I called IT and had them return the monitor they took Tuesday, back to me to see if it would work on another computer. It worked fine using the VGA plug, as a second monitor on a laptop, so... I started a google search on vx922 problems and immediately found this forum!

Amazing to read the chronicles of this monitor and its problems over a 2+ year span and see what you folks have been doing to fix them. So, I immediately went and took the back off the dead monitor and removed the power supply board, expecting to see a herd of blown caps on it. But no! After closer inspection, I noticed a burn mark near the one 470uf 25v that sits alone near the middle of the board. The burn mark was on the board its self. Turned it over and it is really a hot spot right around one of the two smaller IC's that are mounted on the back of the board. So I went the route of ordering a replacement power supply board for that monitor. I ordered part number: B-00003993 directly from ViewSonic Parts Store.

Then, I pulled the back off the monitor that still works but caused the problems Tuesday and sure enough, there are a couple of bulged caps on it. So, I'm going to wait til I get the replacement power supply board, get a close look at it and see what components are installed on it, and of course try it on the dead monitor to see if it works again, before deciding on how to proceed. My gut feeling is that if the new board has the same crappy caps on it, I'll order enough caps to replace those on the new board, as well as enough to replace all the ones on the other three monitors. (I wish I could get my hands on the other monitor they replaced a couple years ago!)

It would go without saying how fantastic a find this thread was and I'm sure thankful for everyone who has contributed to the info on here! Thanks all.

My boss (older lady and not very technical) is thoroughly impressed that one, I found this information and that the IT folks never even tried to look for a fix, two, that I was able to pull the boards out of both monitors, show her the problems, find the part for $40 with shipping, and three, that I put the board back in the monitor that still worked, put it all back together and it STILL works! Wasn't a big deal for me, but I guess it was for her. I've done a lot of board level soldering in the past, so I am looking forward to fixing these units and getting some more value out of them. Thanks again and, I'll report back with my findings.
 
Update: Got the power supply board in and tested it on the dead monitor and it is working perfect again! I looked at the caps on the new board and they are different, but their date codes are all pretty new. Boss decided to go ahead and order replacement boards for the other monitors we have instead of me ordering the caps and soldering them in, so I'm off the hook as far as that goes. Thanks again to the members here for posting this info!
 
First of all thank you for this page. I ordered the parts and followed the walk through with an engineer friend and we were able to get the monitor working again! We replaced the caps that were damaged, and we even replaced the caps that hadn't gone bad yet.

However, I've now run into other issues. I use the VX922 as my secondary monitor for iMac (first aluminum generation). The monitor works as it should, but after an hour or more of use the iMac will freeze and both screens will go blue, as if the iMac lost connectivity. After a few seconds, the screens will return to normal, but once you move the mouse, the screens will lock up again.

Right now the only solution is to unplug the VX922. I felt the monitor and I noticed it's warm, but not anymore than usual after that length of use.

Any thoughts on the matter? Thanks a bunch!

~ MW
 
I also solved the problem successfully with replace the capacitors in my VX922.

This is the list of original capacitors on power supply panel of VX922:

1. CapXon 1000uF @ 10V - 105°C : 2pcs
2. CapXon 470uF @ 25V - 105°C : 3pcs
3. CapXon 470uF @ 10V - 105°C : 1pc

I highly recommend to use capacitors with parameters below instead of the original:

1. 1000uF @ 16V - 105°C : 2pcs
2. 470uF @ 35V - 105°C : 3pcs
3. 470uF @ 16V - 105°C : 1pc

As you can see the voltage values are increased a bit in order to have them reserve, but the other parameters are the same. It is very important!

If you keep the original voltage value the problem may occur again after some months/years usage.

Other info (may be useful):

- Be careful when you remove the plastic back panel of your monitor. It is easy to broken (I experienced unfortunately).
- Watch the polarity of capacitors before soldering! Important! Usually the negative sides are marked.

Best Regrads:

Who never buy again any Viewsonic product.
 
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