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Thread: Tom's Hardware: Why Power Supplies Fail

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    Quote Originally Posted by jonnyGURU View Post
    Most infant mortality is due to poor soldering that fails AFTER a number of cycles (hot, cold, hot).

    I get much of my equipment old, so don't get to see much infant mortality. Could the problem have got worse due to lead free solder?

    Then again, how about tin whiskers?
    https://nepp.nasa.gov/WHISKER/background/index.htm
    Last edited by ashiekh; 03-27-2018 at 09:11 AM.

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    Ants really like the clear glue seasonic use to protect bottom PCB

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    This article wouldn't be possible of course without my sources, which I thank a ton for helping me and providing the photos

  4. The Following 2 Users Say Thank You to crmaris For This Useful Post:

    ehume (03-27-2018), GDILord (03-28-2018)

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    Quote Originally Posted by crmaris View Post
    This article wouldn't be possible of course without my sources, which I thank a ton for helping me and providing the photos
    Great article, but in the capacitor section you have one dissipating 25W

    http://www.tomshardware.com/reviews/...01,4193-4.html

    I don't think that is very realistic
    Last edited by ashiekh; 03-27-2018 at 09:09 PM.

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    Very nice and interesting article. I like the insect part with bugs "not software bug".

    The PSU (like any complex electronic) is nothing than chain of components arranged and designed to work in harmony together. Any of those parts are susceptible to failure starting with cables, X caps Y caps, filtering caps, MLCC's, MOSFETS, diodes, protection chip, coils, thermistor, MOV, transformer and even the PCB itself, and finishing with connectors. If one of those parts is coming with factory defects which passes the factory QC check, than that PSU would fail sooner or later. Apart of this, there is also the design itself which can have a major impact on the components if it's not well engineered, some component would have more stress applied than it's design and would take at a failure sooner than expected.
    There are also external factors, not related to the quality of the PSU or it's components, like bugs (not software bugs), insects, dust, humidity, temperature, vibrations and power line quality which can have a catastrophic impact.
    In my opinion the PSU is most stressed part in the every application and that's why I consider it the most important part of the PC's.

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