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  1. #1

    jsykes's Avatar
    Member Since
    Aug 01, 2010
    Posts
    2
    HELP! Monitor causes G4 to lose power
    Recently upgraded my cpu on my G4. I got the cpu from Sonnet. I installed it, and the computer wouldn't boot. I put the old cpu back in, went online to make sure firmware was up to date. I installed the software from the Sonnet install cd, and then I re-installed the new cpu, and nothing. The fans barely move, and stop, barely move, and stop. The monitor doesn't work either. I know it's a power issue, but have no idea what to do to fix it. If I unplug the monitor, the tower starts up fine, but if I plug in the monitor, it shuts down the power to the computer. Any and all help is greatly appreciated!

  2. #2

    hughvane's Avatar
    Member Since
    May 18, 2008
    Location
    Banks Peninsula, Canterbury
    Posts
    3,314
    Specs:
    MacMini 4.1, OS 10.11 and 10.6; Macbook Pro 8.2, OS 10.11, MacBook 4.1, OS 10.6.8
    You'll need to supply more information if you want detailed assistance.
    1. What model of G4?
    2. What Sonnet upgrade unit, and from where?
    3. Is the Sonnet the right unit for your model of G4?

    Can you power the monitor separately, rather than from (what I assume is) the G4's power-out socket?
    ABCDEFGHIJKLMNOPQRSTUVWXYZ
    Please post your Mac (or other) specs and MacOS version in your post, your profile or your signature. It helps us to help you better.

    I'm leaving now to go and find myself. If I should return before I get back, please ask me to wait.

  3. #3

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    22,254
    Specs:
    Imac 27" Retina 5K, 512GB flash memory, 3.3GHz, 16GB memory, macOS Sierra beta.
    And some CPU upgrade units came with an adjustable system bus speed settings via jumpers. Is this one of this type and if so are the jumper set correctly?

  4. #4

    jsykes's Avatar
    Member Since
    Aug 01, 2010
    Posts
    2
    Quote Originally Posted by hughvane View Post
    You'll need to supply more information if you want detailed assistance.
    1. What model of G4?
    2. What Sonnet upgrade unit, and from where?
    3. Is the Sonnet the right unit for your model of G4?

    Can you power the monitor separately, rather than from (what I assume is) the G4's power-out socket?
    It is a G4 Digitial Audio. The Sonnet upgrade is the Encore ST/G4 1.6 Ghz and there customer service has informed me that it is compatible, and there should be no issues.

    I did notice, however, that I have a bent pin in the male connector coming from the monitor into the computer. I think that is my problem. I tried to bend the pin back, but it doesn't work. May have to research how to replace that cable that goes from monitor to computer.

  5. #5

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    22,254
    Specs:
    Imac 27" Retina 5K, 512GB flash memory, 3.3GHz, 16GB memory, macOS Sierra beta.
    Bent pin will do it for sure. Trust it is not an ADC cable from your Apple display?

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