LCD repair - Dell S2209Wb

[@wonderfulworld5134]

Effective Serial Resistance, or ESR. A blown capacitor that dried up inside can pass no AC current. A capacitor blocks DC current, but when used to pass AC current, they cannot be with a high resistance or no voltage output.

[@greatglobsofoil8078]

Yup. But for this video I wanted to keep it simple. and replace components with equal components. Only improving the cycle life if possible.

[@manipunation]

I just learned from another video that you can use larger voltage capacitors with the same capacitance rating, as long as you aren't dealing with a SMPS, which I discovered stands for Switched-Mode Power Supply. So now I have to ask, is the power supply for a S2209Wb monitor a SMPS?

[@wonderfulworld5134]

@@manipunation A step down transformer & Bridge Rectifier with a Capacitor to smooth the waves to DC is conventional. A short circuit has to fused or they will fry the circuit board foil. A SMPS can be shorted and it pulls down the voltage to zero and no fuse has the current to blow. I went with an Audio capacitor that would be better. A capacitor vents at the bottom after excessive heat or 5000 hours to dry up. Just a poor performance circuit that will whistle if in an audio circuit. Hey... do not use a soldier sucker it pulls off the foil, only use a wick and LEAVE the solder at the base pad or you may loose the pad. JUST soften the solder and pull out the capacitor to put in a new one.

[@greatglobsofoil8078]

@@manipunation It is a switch mode type. but there is more parts in the system besides it. typically only small capacitors need to be exact since they probably are part of logic system. large once are for power smoothness or other functions. If you not feeling confident in your work, it be safer to go with a new board swap instead.

[@jash1960]

Enjoyed your techniques

[@deangroves1967]

I have got to say that you are a legend.

[@j.lietka9406]

Did you look on-line for schematics for that monitor? Thank you 🤓

[@greatglobsofoil8078]

nope lol. I knew it be something simple. So I just dug right in. it be similar for many other monitors also.

[@manipunation]

Thanks for the video! This is exactly the problem I am having with my S2209Wb. But I went to the DigiKey website and entered that model number and got - nothing. Did you buy a kit they are selling for fixing this monitor, or did you pick out the electrolytic capacitors yourself that you found on that circuit board you worked on? I found something on eBay that is supposed to be a kit of the caps you need, but maybe they are not of the best quality as maybe the DigiKey caps are. Also, couldn't we substitute these capacitors with some of a different kind that would actually last? These electrolytic types always seem to fail eventually...

[@greatglobsofoil8078]

Its probably possible to replace the caps with non electrolytic. but I dont think its needed. The caps are good for a while. Plus the solid capacitors would change up the features of the circuit that may not be a good idea. I saw those kits on ebay as well, they seem to be ok, probably the easiest route is to get those kits. in terms of digikey, need to go to the part category first, than can filter by type. to get the higher life parts, scroll through the Lifetime @ temp. though I would not get hung up on that. for example: www.digikey.com/en/products/filter/aluminum-electrolytic-capacitors/58 If not much familiar with the components like this, I would suggest to go with the kit. It be much easier.

[@manipunation]

@@greatglobsofoil8078 First of all I wish you had gone into more detail about how to get the bezel off. That took me a few hours to figure that out and get it off (I couldn't figure out where the seam was or what was holding it together). Then as I pulled off the 2 little sets of flat cable (with 5 wires each) from where they were connected in, I felt very uneasy about how I was going to get them back on, as they were not what I had hoped, connectors going into connector-receptacles. Rather, they were just exposed wires on the end stuck into this thing that had contacts that hopefully I can get back in correctly so all the wires make contact like they should! There was just some very tiny piece of plastic to hold both of those cables in place connected in, sigh! So anyway, I ordered this kit on eBay for a S2209W monitor and it just arrived yesterday. On my power board are: 2 16v 1000µF, 4 35v 330µF, 2 16v 470µF, 2 50v 47µF. Now here is what I got in my kit: 2 25v 1000µF

[@greatglobsofoil8078]

@@manipunation thats good suggestion. when i did the video the monitor was already apart since i had to see what parts I had to get.

[@illogical1421]

Now if only I had the needed tools or knew where to get them + the capacitors where I'm from...

[@greatglobsofoil8078]

Tools are most basic, and the parts you can actually buy kits already pre-made. Not sure where you from, but it is generally sold since its basic components for electronics.

[@redballoon9226]

cool guy..

[@MrDjaTLast]

What is the name for that big blue capacitor?

[@MrDjaTLast]

WHere can I find it online that blue capacitor

[@yurishnirman3847]

@@MrDjaTLast I bought all required components from DigiKey

[@yurishnirman3847]

They are all electrolytic capacitors

[@jash1960]

Bro you should hv checked every time after replacing capacitor so as to make out which was exactly faulty

[@yurishnirman3847]

Too much hassle. It is better to go ahead and replace them all. Since they all cycled about same amount. This way all of them are good.

[@jash1960]

@@yurishnirman3847 usually I prefer replacing all capacitors but first I try find out which one is a trouble maker 😊😂

[@yurishnirman3847]

@@jash1960 make sense. I think I pointed out the one that were bloated. Also the one that were exposed to extra hot.

[@ABCD-fl8bi]

Nice

[@FSX239]

No burning FACE like last time!!!!