Symptoms of a bad power supply?

Discussion in 'Macintosh Computers' started by tbodine, Aug 30, 2003.

  1. tbodine macrumors newbie

    Joined:
    Aug 30, 2003
    Location:
    Kansas
    #1
    Hi.

    What are the common signs that a power supply is dead?

    Are there fireworks? Or is the Mac just dead as a brick when you hit the power key -- no chime, no sad mac, no hum or whir? (I currently have a MacBrick.)

    I'm trying to keep an older Mac (Performa 6320CD) alive for awhile. I think it's either the power supply or the ADB port. But I have no experience with dead power supplies. (Replaced the internal battery 2 years ago.

    Thx,
    Tom
     
  2. MacsRgr8 macrumors 604

    MacsRgr8

    Joined:
    Sep 8, 2002
    Location:
    The Netherlands
    #2
    Other way around: If the power supply is defective, the Mac will be like a brick.
    I have suported quite a few Performa 6320s a couple of years ago, and once they hit the 3 years age, with daily use, many power supplies became defective.
    Usually no fireworks at all. But most of the time I could smell a faint "burnt" smell on the power unit.
    Also on the back, there is a small on/off button. If the back of the Performa is facing you, then the button is located all the way on the right. It's white, and more a "bubble" than a switch, if ya know what I mean. You can try to startup the Mac with that, to make sure it's not an ADB related problem.
     
  3. tbodine thread starter macrumors newbie

    Joined:
    Aug 30, 2003
    Location:
    Kansas
    #3
    Thanks! That helps pin it down.

    Since you have been down this road, do you have any advice on the procedure to replace the power supply?

    I see there are many similar models of Performa / PowerMac that share this form factor. Seems the processor or clock speed was the main difference among them. Do you think a power supply for any of the similar machines will do the job?

    Thanks again!
    Tom:)
     
  4. MacsRgr8 macrumors 604

    MacsRgr8

    Joined:
    Sep 8, 2002
    Location:
    The Netherlands
    #4
    You're welcome.
    From what I remember, we did replace (once in a while, if we didn't have another 6320 to rip apart) that power supply by a 6300 or 6200 one.
    I recall it was quite a bit of a hassle to replace it though. Once you have done a couple, it becomes routine though... so it wasn't too difficult. :)
     

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