Swollen capacitor, no leakage shall I replace it?

NEDZHIP · Aug 20, 2017

Hello,

I just noticed that one of the capacitors in my motherboard is swollen a little bit, there is no leakage and the system is working just fine.

I wonder if I have to replace it and if I don't what's the risk of it damaging the motherboard?

Thank you in advance.

GhislainG · Aug 20, 2017

There's no risk if you don't replace it; but you may run into unexpected issues when it gets worse. I presume it's an old motherboard?

NEDZHIP · Aug 21, 2017

Not that old B75 Pro 3 (LGA 1155 socket).

I just noticed one of the caps is swollen.
I have already replaced caps a lot of times in other mobos and monitors but I am too lazy to find replacement caps, remove the motherboard from the case a lot of work. So I through maybe I shall leave it as long as it works and replace it when it fails totally.

GhislainG · Aug 21, 2017

That certainly is an option.

cooldex · Aug 21, 2017

have you ever had to replace one of the smd capacitors (flat ones) cause i have to do that on my laptop, wondering if you had any tips heres a pic

cooldex · Aug 21, 2017

http://s50.photobucket.com/editor?image=http%3A//i50.photobucket.com/albums/f321/cooldex77/20170816_141051_zpsu6s0wgm8.jpg&detailUrl=http://s50.photobucket.com/user/cooldex77/media/20170816_141051_zpsu6s0wgm8.jpg.html?sort=3&o=0

the small burn't one by the two big round capacitors

NEDZHIP · Aug 21, 2017

cooldex :

Yes I did few times, but idk if I'm doing it correctly but it worked for me.
My English isn't that good but I will try to explain as much as I can.

I think SMD's are even easier to replace since they don't have legs, so you can replace it without removing the mobo from the case.
Usually I use a tweezer to replace these.
Just grab it with the tweezer, heat the both sides and gently remove it from the motherboard.
Use a desoldering wire to remove the left over soldering iron.
Grab the new one with a tweezer, position it correctly in the motherboard and solder the both sides - here you may need another person to keep the cap in position with a tweezer while you're soldering.

Things to note
Make sure you're placing the new one in correct polarity.
Don't heat the motherboard too much or you may damage the PCB.
Don't use too much force while you're removing the old one, if it isn't coming easily than it means you didn't heated it enough.

cooldex · Aug 21, 2017

now from what i can see, how do tell the polarity if theres isn't a positive or negative, and is it a way to find out specific voltage ratings and such, because i just order a few of the same size's within 6-10volts (6 lowest)

cooldex · Aug 21, 2017

and i picked up the parts from DIGIKEY here's a link from what i narrowed it down from 300,000 to 19 and im not completely sure if that's all of them that measure up to the same size.

https://www.digikey.com/products/en/capacitors/ceramic-capacitors/60?k=478-11&k=&pkeyword=478-11&pv14=4&FV=fffc01de%2Cb839f7%2C11401c5%2Cffe0003c&mnonly=0&ColumnSort=0&page=1&quantity=0&ptm=0&fid=0&pageSize=500

NEDZHIP · Aug 21, 2017

Ah these are ceramic caps, these don't have a polarity, so you can put them either way round

cooldex · Aug 21, 2017

ok thats great

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