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Old 12-16-2019, 02:49 PM   #1
voltman
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Default Dell S2209WB monitor hard to turn on and shuts down by itself

Monitor is very hard to turn on, but if I keep trying, eventually, after many, many attempts, it will come on. Then it started shutting down by itself and it got harder and harder to get back on. I checked for shut off timer, and energy saver and they are not on.

My research showed this is a common problem with monitors and the capacitors may be the cause. I took the monitor apart and the power board does not "visibly" show anything wrong and the capacitors all "look" good. Same thing with the main board. Pics below

Currently there does not seem to be any replacement power boards available. There are capacitor kits available. Pending what I learn here, I am thinking of pulling all 10 capacitors on the power board and testing them with a multimeter. My understanding is that without a ESR meter, this is the only way to check the capacitors. I have never checked capacitors before and would appreciate any guidance on repairing this monitor or testing the capacitors either on the board if possible, or off the board if necessary.

While I am a amateur at this, I have and can use a multimeter and soldering equipment. Thank you in advance for any help you can give me. Pics below.
Attached Images
File Type: jpg Power Board.JPG (1.85 MB, 24 views)
File Type: jpg Power Board 2.JPG (1.81 MB, 16 views)
File Type: jpg Power Board Back.JPG (1.91 MB, 9 views)
File Type: jpg Main Board.JPG (1.95 MB, 10 views)
File Type: jpg Main Board 2.JPG (1.86 MB, 8 views)
File Type: jpg Main Board Back.JPG (1.92 MB, 7 views)
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Old 12-16-2019, 03:27 PM   #2
petehall347
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Default Re: Del S2209WB monitor hard to turn on and shuts down by itself

i see 4 bulged on the top . all on the cold side
and 1 on the hot side ..all brown ones .
renew them all

Last edited by petehall347; 12-16-2019 at 03:29 PM..
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Old 12-16-2019, 04:08 PM   #3
voltman
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Default Re: Del S2209WB monitor hard to turn on and shuts down by itself

Quote:
Originally Posted by petehall347 View Post
i see 4 bulged on the top . all on the cold side
and 1 on the hot side ..all brown ones .
renew them all
Thanks petehall347! Are these the ones you are talking about? (pic below)
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File Type: jpg Power Board marked.JPG (1.80 MB, 23 views)
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Old 12-16-2019, 06:03 PM   #4
petehall347
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Default Re: Del S2209WB monitor hard to turn on and shuts down by itself

yep them are those
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Old 12-17-2019, 12:29 PM   #5
voltman
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Default Re: Del S2209WB monitor hard to turn on and shuts down by itself

I am going to recap the power board on this monitor, would it be a good idea to also recap the main board? Do main board capacitors frequently go bad? My very limited understanding is, capacitors are all prone to go bad so maybe I am answering my own question here?

Or, is the main board capacitors less likely to go bad? What would the experts here do?
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Old 12-17-2019, 12:33 PM   #6
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Default Re: Del S2209WB monitor hard to turn on and shuts down by itself

i would do the power board .
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Old 12-31-2019, 07:16 PM   #7
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Default Re: Dell S2209WB monitor hard to turn on and shuts down by itself

I am using Rubycon capacitors to recap the power board. Two of the 1000 uF 16V capacitors on my board have a diameter of 10mm and the Rubycon replacement ZLH series has a diameter of 8mm. I can get a Nichicon HZ series capacitor which also has a diameter of 10mm so I guess this would be the way to go?

I have spent a lot of time researching this with no definitive answer other then newer capacitors sometimes tend to be smaller and as long as they are rated the same I should be good.

Also, two of the 47 uF 50V capacitors on my board have a diameter of 6.5MM while the Rubycon replacements have a diameter of 8MM. I do not think that room or heat would be an issue. Will I be ok if I use the larger diameter 8mm capacitors here? The two in question are circled in the pic below.
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File Type: jpg Power Board 3 (Large).JPG (359.1 KB, 11 views)
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Old 12-31-2019, 08:16 PM   #8
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Default Re: Dell S2209WB monitor hard to turn on and shuts down by itself

The diameter does not matter as long as there is room for them. sometimes smaller diameter caps can be taller. Cap sizes can be made smaller now due to better materials. You can also increase the voltage on the 1000µf 16v to 25v
Also don't buy them off ebay, use Digikey or Mouser etc.

Last edited by R_J; 12-31-2019 at 08:24 PM..
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Old 01-01-2020, 08:32 AM   #9
voltman
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Default Re: Dell S2209WB monitor hard to turn on and shuts down by itself

Thank you for the reply. Would increasing the voltage to 25V make them likely to last longer on my application? Four 330 uF 35V capacitors went bad on this monitor can I up the voltage here to make them last longer? If so to what? Thanks

Last edited by voltman; 01-01-2020 at 08:38 AM.. Reason: content
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Old 01-01-2020, 10:38 AM   #10
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Default Re: Dell S2209WB monitor hard to turn on and shuts down by itself

With quality capacitors like Panasonc, Rubycon etc. they will last longer, but you can increase the voltage, that will also help. The 35v rating is likely ok but you can go from 35v to 50v but the size can also increase so check the size of the replacement.
It's just a lcd monitor power supply, its not really under a lot of stress like a power supply in an industrial application would be.
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Old 01-01-2020, 07:05 PM   #11
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Default Re: Dell S2209WB monitor hard to turn on and shuts down by itself

Did I make a mistake with one of the series of capacitors I ordered? After ordering, I found the spec sheets and 4 of the new capacitors are PX series, which are rated standard with a load life of only 1000 to 2000 hours. All of the others ordered (ZLJ, ZLH series) are rated long life, with a load life of 6000 to 10000 hours and two RX series are rated automotive and LED lighting applications, with a load life of 1000 to 4000 hrs. The PX series will replace the bad ones on my board. Was this a poor choice?
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Old 01-08-2020, 12:15 PM   #12
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Default Re: Dell S2209WB monitor hard to turn on and shuts down by itself

I recapped the power board, monitor is now working great! Thanks petehall347 and R_J for your help and also Chris from Badcaps.net who provided the caps and technical information.
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File Type: jpg P1190691.JPG (1.97 MB, 11 views)
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Old 01-16-2020, 04:24 PM   #13
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Default Re: Dell S2209WB monitor hard to turn on and shuts down by itself

+1
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