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Thread: Dead Logic Board?

  1. #1

    Default Dead Logic Board?

    Alright, so out of no where, the Logic Board on my faithful 3 year old Mac Mini just randomly died!
    So I took it to the Apple store and they said a new one would cost $400!! So I decided just to take out the hard drive and put it in an enclosure so that I wouldn't loose all m stuff. Does anyone know what would cause this?

  2. #2

    Default

    Maybe a poor power supply (dirty voltage), but most likely nothing, it just died. This happens to motherboards in PC's often - many times caused by bad (bulging or leaking) capacitors. In the early 2000's alot of motherboard manufacturers started buying cheapo caps for their boards. I can't remember the whole story but I think one capacitor company stole another company's proprietary manufacturing techniques, but didn't get all the info - and ended up making a bunch of bad capacitors:


    I would go on ebay (if you want to fix it) and you'll probably be able to find a replacement logic board, or even the whole shell of one. Just make sure that if you only buy a logic board - it's the same as the one you're replacing. Good luck

  3. #3

    Default

    I finally know what capacitors are, I thought thats what they were, but I never totally knew, why I didn't just google image search, only god knows.

  4. #4

    Default

    Yup, those little buggers are responsible for so many problems with consumer electronics. I've fixed a bunch of TV's where the capacitors start to go (their capacitance value wavers) causing stress / overheating in other components. Usually if I fix, for example, the power supply in a TV, I'll replace all the caps in it as well, just in case.

    For example, here my motherboard from about 4 years ago. The caps were all bad on it, and it caused so much overheating in the power section of the board, look what happened:



  5. #5

    Default

    Oooh, those little ****ers caused one of my compies to act really strange before. It would randomly reboot or shut down. I unplugged it and quit using it for a while, but when I finally opened it up to dust it out, I noticed all the capacitors around the processor's heatsink were bulging out like that. Needless to say I ditched that mobo and got a new one.

    Hope you fix your computer Kams!

  6. #6

    Default

    The bad capacitor problem is slowly starting to become less important, my motherboard has all solid caps and they don't wriggle or anything.

    I don't think I've ever had a problem with capacitors, but I think one of them on an old motherboard may have vented very slightly.

  7. #7

    Default

    Replacing capacitors seems to be a little bit of a faff. And isn't it better to replace them all, because it would only be soon for another old one to pop like that.

    And as for power supplies, to paranoid to shock myself :P. I guess you could go round and drain each one. But I feel that buying a whole new one is better, then you know it will work and comes with a renewed guarantee/warranty.

    But if you want a cheap easy Fix, as Andysetra Said, go on ebay.

  8. #8

    Default



    Quote Originally Posted by Spirit View Post
    The bad capacitor problem is slowly starting to become less important, my motherboard has all solid caps and they don't wriggle or anything.

    I don't think I've ever had a problem with capacitors, but I think one of them on an old motherboard may have vented very slightly.
    Yes, the problem is less common now in motherboards, because those 'bad' brand caps haven't been used in years. But...good brand caps can still cause problems in a switching power supply (see computer psu and most all consumer electronics). I just figure that for $12 and a little soldering, I can be sure they won't cause me any grief.

  9. #9

    Default

    Heheh, I thought this was a suggestion for a new board where you were allowed to do nothing but debate things with the most critical logic and reasoning... Other than that, I has no business here!

  10. #10
    Tigger

    Default

    I had a capacitor explode right in my face once, scared the livin shit outta me:shocking:

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