Franko Gramatica

Q: Hi I can't find the cuda switch in my PowerMac g4 dual mirrored, What is the difference between resetting pram by keyborard or cuda?

Hi

I can't find the cuda switch in my PowerMac g4 dual mirrored, 1,00

What is the difference between resetting pram by keyborard or cuda?

Switching on the opened Mac I can see a little red light and listen the classic sound

but nothing appear on monitor.

Connecting by firewire with my Mini mac I can see and backup the PowerMac hd

The battery was produced in Dec 2012 (that is strange, cause I've bought the dual

years before and never changed)

Thanks for attention and sorry for my english...

Posted on Apr 4, 2016 4:39 AM

Close

Q: Hi I can't find the cuda switch in my PowerMac g4 dual mirrored, What is the difference between resetting pram by keyborard or cud ... more

  • All replies
  • Helpful answers

  • by Allan Jones,Apple recommended

    Allan Jones Allan Jones Apr 4, 2016 1:49 PM in response to Franko Gramatica
    Level 8 (35,131 points)
    iPad
    Apr 4, 2016 1:49 PM in response to Franko Gramatica

    First I need to caution you. The G4 MDD does NOT have a CUDA button like older Macs--it has a PMU reset button. The difference is that, for a computer with the PMU system like yours, you give the button ONLY one short push, no longer than one second.

     

    If you treat it like it is a CUDA button and hold it for 20 seconds, you will seriously harm your computer. That said, this image shows the location of the PMU reset button in a G4 MDD:

     

    G4 MDD logic board.jpg

     

    What is the difference between resetting pram by keyboard or cuda?

     

    As your G4 does not have CUDA reset capability, this becomes a moot point. In older Macs (Beige G3 and older--teh "Old World ROM" Macs) resetting PRAM via the keyboard did not fully zero everything; the CUDA reset did.

  • by BDAqua,Helpful

    BDAqua BDAqua Apr 4, 2016 1:49 PM in response to Franko Gramatica
    Level 10 (123,603 points)
    Apr 4, 2016 1:49 PM in response to Franko Gramatica

    Hi, since it is starting in FW Target Disk Mode, it may be the video card... is the a floating FW synbol on the MDD's screen?

     

    If so try booting the MDD in Safe Mode, holding SHIFT key at bootup.

  • by Franko Gramatica,

    Franko Gramatica Franko Gramatica Apr 4, 2016 2:25 PM in response to Allan Jones
    Level 1 (53 points)
    Old Hardware
    Apr 4, 2016 2:25 PM in response to Allan Jones

    Hi Mr Jones

    thanks for your answer

    Now I understand why I didn't found the button, in spite of many answers in different forums suggesting the use of it and showing photos too!

    Do you think this resetting can be useful?

    What about the battery?

    Thanks!

  • by Franko Gramatica,

    Franko Gramatica Franko Gramatica Apr 4, 2016 2:29 PM in response to BDAqua
    Level 1 (53 points)
    Old Hardware
    Apr 4, 2016 2:29 PM in response to BDAqua

    Hi!

    I want to thank you too and ask if you can suggest one ore more not expensive cards

    If I understand this can be the solution if the safe mode boot will be not useful...

    Thanks!

  • by BDAqua,

    BDAqua BDAqua Apr 4, 2016 6:21 PM in response to Franko Gramatica
    Level 10 (123,603 points)
    Apr 4, 2016 6:21 PM in response to Franko Gramatica

    See japamacs page here on the best AGP cards for G4s & G5s...

     

    http://www.jcsenterprises.com/Japamacs_Page/Blog/4B4B7BA2-7ABB-47F1-87AC-B03D379 42BEE.html

     

    Rated slowest on top, fastest on bottom

  • by Franko Gramatica,

    Franko Gramatica Franko Gramatica Apr 17, 2016 1:40 AM in response to BDAqua
    Level 1 (53 points)
    Old Hardware
    Apr 17, 2016 1:40 AM in response to BDAqua

    Hi! THANKS!

    PARKER,sorry, MDD LIVES!

    I tried the PMU reset but the bootup wheel (is the right term?) after a while stopped run (sorry for english)

    Then I paralyzed my finger holding shift button  and MDD works!

    Sorry! "I'm incurably romantic" I so like the appearance of my wind tunnel

  • by Franko Gramatica,

    Franko Gramatica Franko Gramatica May 7, 2016 6:53 AM in response to Franko Gramatica
    Level 1 (53 points)
    Old Hardware
    May 7, 2016 6:53 AM in response to Franko Gramatica

    Hi Mr Jones

    here I'am for the I hope the not final funeral of my MDD

    All like before:

    BLONG

    WHEEL running

    DO NOT ENTER SIGN

    and after a long running: THE WHEEL FREEZES