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Why Electrolytic Capacitors Would Not Last?

By Jestine Yong on February 14, 2014

Hi Jestine,

I hope you are okay, its been along time. I have this problem with server power supplies, they seam break one
after another (in different servers). I noticed the first one that fans could spin, but the server could not
power up. When i opened the PSU, i saw that a few capacitors were bulged. When i replaced with new ones, the server come back alive. Two weeks later another server has done the same thing. Just showing that its on standby, i noticed that two capacitors were bulged too, replaced them and its now ok.

Can this be a problem with over voltages or that the servers are not being cooled sufficiently? Please help.

Answer:

There are few reasons, you can check on these links:

https://www.jestineyong.com/how-long-will-a-capacitor-last/

https://www.jestineyong.com/electrolytic-capacitor-have-the-highest-failure-rate/

https://www.jestineyong.com/electrolytic-capacitors-still-giving-problem/

Jestine

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4 Comments

Humberto N. Rdguez.

February 14, 2014 at 11:52 pm

Hi, e-caps nowadays are affected for some reasons:
* Bad quality of the component.
* Voltage must be taken into consideration.

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Humberto N. Rdguez.

February 14, 2014 at 11:56 pm

Hi, e-caps nowadays are affected for some reasons, I'll tell you some:
* Bad quality of the component.
* Voltage must be taken into consideration.
* The temperature at which it works is a very important fact. Sometimes it's necessary ventilation by means of fans, such as: SMPS in PCs, some Audio Amplifiers, etc.

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Amir Mukhtar

February 15, 2014 at 12:15 am

Sir Jestine
thanks you for sharing Servers Power supply repair Article
I am also facing like above problem .
soon will share .

thanks you
yours student Amir Mukhtar Ashrafi

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Robert

February 15, 2014 at 2:06 am

Lol ...job security.

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