Problems in a Mac..this is not happening!

Discussion in 'Mac Basics and Help' started by Macintosh001, May 22, 2008.

  1. Macintosh001 macrumors member


    Nov 2, 2007
    I have had an iMac G5 for 3 years almost and lately the USB ports are failing they stop functioning and maybe after restarting they work again.The problem has happened again and I don't know what it can be,can anyone give me any advice? Also with this problem another problem has appeared...when I introduce a CD it makes noises and it doesn't read 'em but also after restarting it is usually fixed

    I guess it is not a hardware problem because after restarting the problem usually stops but what kind of software problem can it be??

    Thank you!
  2. merl1n macrumors 65816


    Mar 30, 2008
    New Jersey, USA
    You may have some corrupt cache files (hardware), corrupted PRAM, etc.

    I would do this in this order:

    1. Reset your PMU
    2. Reset your PRAM
    3. Perform a "Safe Boot" then restart normally.

    See if this fixes your problem.
  3. patrick0brien macrumors 68040


    Oct 24, 2002
    The West Loop

    Hardware issue indeed, but the problem causing your sympoms may not be what you think.

    For the first-generation iMac G5, there is a known problem with the electrolytic capacitors, they tend to expand and die - some may burst. FYI- in 2004 a company began creating these capacitors based on an incomplete spec of the main supplier of these capacitors, but for much cheaper. The entire electronics industry was duped by this, not just Apple.


    When these capacitors go, and they go gradually, wild, weird and wacky things can happen. A friend of mine's display would turn on, anothers USB ports stopped working altogether, and myself, I'd start it up, it would glerg on the spinning apple, after letting it warm up in that state, I could trounce it for a normal startup.

    I'd see an Apple repairer soon...

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