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  1. #1


    Member Since
    Jun 28, 2011
    Posts
    3
    G4 will not turn on monitor
    I have a PowerMac G4 M8570, it powers up, I hear a fan but it will not power up a monitor, I changed the video card with no success.

    Anyone heard of this?

  2. #2

    twitchymike@mac's Avatar
    Member Since
    Feb 24, 2006
    Posts
    73
    Specs:
    G4 + Mac Pro 8-core 6Gb
    G4 Headless
    I've been making use of my MDD G4 as a file server and for streaming media. I use screen sharing to do any occasional admin - generally all it has are a kettle lead and ethernet. There is no monitor attached.

    It's full of disks, RAM, and the best AGP card I found, years ago.

    One thing I don't like is the noise the graphics card makes. I'd like to get rid of that and put the original card back, which would be silent, with no fan on it.

    No monitor needed, but when I screen share (vnc) would that reduce the performance? I get a great desktop view remotely, but does it require the good card to produce that? This is transferred over LAN. Anyone know if the card is used for that?

  3. #3


    Member Since
    Jun 28, 2011
    Posts
    10
    Make sure its not the monitor that went bad, i would also try making sure you replaced the existing card with a compatible one. I have a few G4's and they will give you lights and fans but no boot if one of these is out of line; processor, ram, video card. if your computer doesn't give you the mac "bong" sound when it boots then its probably not booting so try reseating the graphics card too. Once you've eliminated some of the obvious variables then you can move on to something more serious like a fried motherboard or bad AGP slot. if you've got a PCI graphics card, maybeeeeee you could try that?

  4. #4


    Member Since
    Jun 28, 2011
    Posts
    3
    i do get a bong noise, i am not sure about the card.

  5. #5


    Member Since
    Jun 28, 2011
    Posts
    10
    That means the computer is booting, since you tried a new graphics card, try checking the monitor (to see if the brightness is all the way down or something, most monitors have a factory reset option) and the connections, make sure its plugged in and powered on, etc. if all is well or if the monitor works on another computer, then i would work with the assumption that your AGP port has defected.

  6. #6

    dtravis7's Avatar
    Member Since
    Jan 04, 2005
    Location
    Modesto, Ca.
    Posts
    28,900
    Specs:
    iMac 2010 27" QuadI7 OSX10.11, iMac 2008 OSX10.11, MBP Late2011OSX10.11 , iPad Air, iPhone 3GS
    What monitor do you have hooked up to your MDD? Are you sure the monitor is working? Do you have another system you can check the monitor with?

  7. #7


    Member Since
    Jun 28, 2011
    Posts
    3
    Yes, I tried a couple known working monitors, no luck

  8. #8

    dtravis7's Avatar
    Member Since
    Jan 04, 2005
    Location
    Modesto, Ca.
    Posts
    28,900
    Specs:
    iMac 2010 27" QuadI7 OSX10.11, iMac 2008 OSX10.11, MBP Late2011OSX10.11 , iPad Air, iPhone 3GS
    Quote Originally Posted by jevanof View Post
    Yes, I tried a couple known working monitors, no luck
    Another question for you. You say you put in a different video card? What card did you install? Just a reminder that only Video cards with Apple Firmware will work in a Mac. Otherwise nothing on the screen if the card uses Firmware code for a PC.

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