G5 will not boot from disk

I cant get my G5 to boot from a dvd....
It will boot off of my hardware diag dvd ,but not off of any 3 of my install disk
Any ideas?
I tried a few commands in Open Fimware prompt :
reset-nvram press Return on keyboard
set-defaults press Return
reset-all press Return
and when i tried the commands the first time, my computer restarted and was able to boot from the os dvd...( after i got it working, i turned it off and tried again, just to see if i fixed it)( i didnt fix it).but now when i type the commands, my computer hangs up on the last command.
Do you know of any other commands i can try, to get my system to boot from a os dvd?
Thanks for your help
tfarquhar

It means something is going wrong before the startup process gets to the stage where it can accept the startup key command input. There are various checks that happen (called POST - pre operating startup test - if I recall correctly). The firmware checks basic things like is there a processor available, how much RAM is connected, is a drive connected…
I think all the early stages are handled by the Boot ROM & NVRAM, these are generally not 'user fixable'. It indicates something is badly wrong. It could be failures in the main logic board or CPU(s) or the power management unit or possibly a dead battery (the small internal 'clock' battery is cheap & easy to replace - worth a try -> search this apple support for 'G5 YOUR MODEL & replace battery')…
Of course it could be something simple like a failed keyboard or usb hub, so try removing everything and just use the Apple keyboard & mouse and one display directly connected to the G5. You should also look for other signs such as beeps or flashes of the power button on startup, remove the outer metal door & look along the RAM slots for any lights when it gets powered on. The support site has info on what they mean.
It couldn't really hurt to try removing and replacing user-serviceable parts such as the graphics card, RAM, HD. Sometimes connections may need reseating. You will also want to remove any other PCI cards that are installed. Again the support site has instructions for all of this, sorry I would link to them for you, but I can't make sense of the model description in your posts.
An Apple service center may diagnose this for you, but unless you have Applecare they will charge you for it.

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    MacBook Pro (17-inch, Late 2011)
    Oct 2011
    10.7.2
    10.7.3
    11C74, 11C2002, 11D2001

  • Macbook Pro Will Not Boot Windows Disk

    I have a late 08 (or early 09) Unibody Macbook Pro 2.53Ghz. I start the Bootcamp Assistant and successfully create my Windows partition. When I restart with the Windows 7 disk, I get a blinking cursor for 1 second then it goes to a black screen and never leaves. I have tried several different Windows 7 disks with the same result. I have even tried booting from a Windows Vista, Windows XP and even a Ubuntu disk all with the same result, stuck at a black screen.
    I took the hard drive out of this mac and put it into my wife's older Macbook pro, and it booted off the Windows 7 disk and completed the install to the drive with no issues. I then put the hard drive back into my Macbook Pro and get the same black screen when trying to start the Windows partition, and still have the same problem that it will not boot from any other OS disk be it Windows or Ubuntu. It boots from OS X DVDs without a problem.
    Also several months ago I had a Windows XP installation on this computer with no issues. I wiped it just before going to Snow Leopard.
    Any clue as to what is going on here?

    What is really odd is if I take my hard drive out of my Unibody Macbook Pro and put it into my wife's non-unibody Macbook Pro, it boots the Windows partition with no problem (Remembering I previously swapped these hard drives to complete the Windows installation to my hard drive). Seeing as the disk boots on her machine fine and not in mine, and my Windows cds (DVDs) boot fine on hers and not on mine, it seems to me it's something specific about my machine, but I can't imagine what it is.

  • Mid-2009 MacBook Pro sees internal SATA hard drive, but will not boot from or format

    I inherited a Mid-2009 MacBook Pro (15-inch, 2.53 GHz model) with a very strange issue.
    It first presented itself as not being able to boot from the internal SATA hard drive that came with the computer. Nothing I tried could get it to boot, so I assumed the file system was corrupted beyond repair and booted from a CD to try to format the drive. Disk Utility on the CD would not format the drive, giving me strange error messages like "Unable to write to the last block of the device".
    At this point I figured the drive itself must be toast, so I pulled it out and put another known-good SATA hard drive in, booted from CD, and attempted to format. Again, same error messages and an unsuccesful format.
    So I had the bright idea of formatting one of the drives in an external enclosure and then putting it in the MBP to see if OS X would even install. No dice. Get a cryptic error message before installation even begins.
    So I installed OS X on the drive in the external enclosure and put it in the MBP, and it attempts to boot, but never goes anywhere.
    So to sum up, the symptoms I'm seeing:
    MacBook Pro CAN see internal SATA hard drives.
    MacBook Pro WILL NOT boot from any internal SATA hard drive and cannot format or install OS X to any internal SATA hard drive.
    MacBook Pro WILL boot from any CD or external device and seems to work properly otherwise.
    At this point I'm thinking it's one of two things: the hard drive ribbon cable or the SATA controller on the logic board.
    Since the MacBook Pro seems to work completely fine other than this one issue, and will boot properly from both external devices and the CD (also a SATA device), I'm thinking and hoping that it's just the hard drive ribbon cable. From my searches online, I've heard that this batch of MacBook Pros is known to have issues with the hard drive ribbon cable, but it seems in most cases this manifests itself by the Mac not being able to see a drive at all.
    I've done quite a bit of troubleshooting to get to this point, but right now I'm just looking for any feedback at all. Specifically I'd love to know a way I can easily test to see whether it's the logic board or the cable.

    UPDATE: An interesting development!
    I just tried a third known-good SATA hard drive, one which I believe supports SATA I only (but I'm not sure), and unlike the other drives that the Mac sees but cannot properly interact with, the Mac can't even see this one when I put it inside.
    Frustrating as this may be, I believe I'm actually getting closer to a solution since my symptoms now appear to be closely aligned with people having SATA ribbon cable issues.
    Onward!

  • Will Not Boot from Install Disc  & 4SNS/1/40000000: TG0D - Thermal Sensor?

    *Will Not Boot from Install Disc*
    I used the "option key" approach with the gray start up disk. At first it ejected the start up disk. Then I nudged the disk back in the machine and it showed on the screen as an option. I clicked on the start up disk image and it finally loaded.
    But, it won't accept the start up disk when holding down the "C" key at restart.
    *4SNS/1/40000000: TG0D*
    I did an Apple Hardware Test and received the following diagnostic:
    Version: 3A121
    Test Suite: Extended Test
    Loop Count: 2
    Result: Failed
    Failure code: 4SNS/1/40000000: TG0D
    *Thermal Sensor*
    A search for the failure code 4SNS/1/40000000: TG0D brought up an Apple Discussion topic entry stating: That error code indicates a problem with a thermal sensor. It could be not working or possibly not connected. You will need to take it to Apple for repair.
    Would a thermal sensor have anything to do with it not starting up when holding down the "C" key at restart? What are thermal sensor problem symptoms?
    *User File Folder Opened Up*
    The machine also starts up with my user file folder opened up rather than with a blank screen as it normally should
    I completed a DiskWarrior rebuild on the disk and verify disk shows it is fine.
    Any suggestions on what to do next with these issues?

    The answer was in your post: "You will need to take it to Apple for repair."

  • G4 that will not boot from any disc EXCEPT the Apple Hardware Test CD

    We have a DP 1ghz Quicksilver PowerMac G4 that will not boot from any disc EXCEPT the Apple Hardware Test CD that came with the machine.
    We were in the process of installing 10.4 Tiger before placing it for sale.
    The Mac was originally OSX Server 10.1 that we later converted to a worksation running 10.3 Panther.
    It has 1 GB of memory, 80GB hardrive, 250MB Zip Drive and a Radeon 7500 video card.
    Since this machine only has a CD-R drive and not a DVD-R, we installed Tiger using another Mac via Target Disk Mode. The installation process went well, but when I tried to reboot I got a Kernel Panic right after startup screen with the grey Apple logo.
    On some reboots we get to the blue startup screen, others it stops at the grey Apple logo, others a black box like the a Kernel Panic - but with no text. Twice it went directly into Open Firmware.
    We have done the following during our troubleshooting:
    - Reseat RAM, Video Card, Hard Drive, Zip & CD-R connections
    - Remove RAM 1 stick at a time and reboot
    - Replace RAM with RAM from another working Quicksilver
    - Replace Video Card with one from another working Quicksilver
    - Zap PRAM
    - Reset CUDA switch
    - Unplug the MAC and remove everything (RAM, Battery, etc) for 30 minutes and try to reboot
    - Tried booting from the Macintosh Server G4 Software Restore CD
    - Tried booting from Mac OS X Server CD
    - Tried booting from AppleCare Protection Plan CD with TechTool
    - Tried booting from Diskwarrior CD
    - Tried booting from an external FireWire drive with a disk image of Tiger OS Install
    - Tried booting with the hard drive disconnected
    The Mac WILL boot from the Apple Hardware Test CD and will pass ALL of the extended tests.

    Conventional wisdom says that any Mac that will not boot up from a System/Install CD OS 9 or an Install CD Mac OS X, has a Hardware problem.
    The diagnostic CD is a red herring because it uses a very primitive method of reading the CD, and so does not properly represent the machines general ability to read CDs.
    I would look at the CD drive cables, etc, and see if another drive gives different results.
    You have not mentioned using the Startup Manager (option key at Startup) to do any checking:
    HT1310- Startup Manager: How to select a startup volume

  • RE: HP XP Media Center 2005 Ed will not boot from HP System Restore CD's

    RE: HP XP Media Center 2005 Ed will not boot from HP System Restore CD's.
    The following instructions about  the "Code Purple" error FAILED. Error is still present.
    ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    ***PLAIN ENGLISH QUICK AND EASY FIX FOR ALL SYSTEMS****
    ***Windows 7 code purple or Windows Vista code purple***
    With the code purple error on the screen, press shift+f10 (the shift key and the F10  key (at the top of the keyboard) at the same time) to open a little screen called a  command prompt. (So, you get a little black screen with white text that says something  about your Windows verison first and a little ways down you'll see "C:\>".   It's all  ready for you to start typing.)
    Type the following line, just as you see it here...
    notepad C:\hp\bin\checkdmi\checkdmi.cmd
    so it will look like this
    C:\>notepad C:\hp\bin\checkdmi\checkdmi.cmd
    Press Enter.
    You will see the text for the file listed in a window using a simple text editor.
    Go to the beginning of the text. Press enter to make a space. Type this...
    goto cleanup
    So, whatever comes after, the first line looks like this...
    goto cleanup
    Save the file and exit notepad and restart your PC. You are good to go.
    ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    RESULT: Same error and problem.
    So, NOW THE SCENARIO IS THIS...[ And A CHALLANGE TO ALL HP Software EXPERTS]
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    1. The PC will not boot the System Restore CD's
    2. The Original OS install and [HP_RECOVERY] disk sector has been severely damaged by
    all of the following:
        A. Massive Virus Infections as shown by Kaspersky Virus Scan and cleaned up.
        B. The user had originally updated the pc to Vista Business Express Upgrade
            (Supplied by HP with the original purchase and warranty).
             (Prior to the upgrade, Media Center was working correctly.)
        C. The original OS product key(XP Media Center Ed. 2005) has been changed by the Vista Business Express upgrade.
        D. The destructve recovery done by PC-Doctor has done user file damage(s).
        E. All software, and possibly hardware could be corrupted & damaged by viruses,
        incomplete recovery, and the unknown failures and conditions.
    To sum up, the system is locked in an unknown state, waiting for expert help.
    (I can allow and manage to let someone diagnose, repair remotely using another OS  i.e.Linux Opensuse 12.1, or XP Home ed if needed.)
    SO IF YOU THINK YOU ARE UP TO THIS CHALLANGE, SEND MESSAGES TO DAVHPForum anytime. Thanks in advance!
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

    Hello @DAVHPForum,
    Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
    I have read your post on how you are not able to boot your computer using the HP system restore CDs, and I would be happy to assist you in this matter!
    If you are not able to recover your system by following the steps in this document, please call our technical support at 800-474-6836. If you live outside the US/Canada Region, please click the link below to get the support number for your region.
    http://www8.hp.com/us/en/contact-hp/ww-phone-assist.html
    I hope this helps!
    Regards
    MechPilot
    I work on behalf of HP
    Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
    Click the “Kudos, Thumbs Up" on the right to say “Thanks” for helping!

  • Optical drive trashed and MB Pro will not boot from USB image

    Hello,
    New here but I have searched and tried all I know to get this MBP working right again. My disk drive is trashed and has been for some time now, this is why I have a bootable version of Snow Leopard on an 8G flash drive. When my MBP began acting funny recently and I went to disk utility to verify permissions and the disk. Both failed = must boot from disk to repair, thus my issue. For some reason by MBP will not boot from the usb image I have used previously??? Pressing C or Option during startup does not work. If I press Option, I only get the harddrive option, C yields nothing and the computer boots normally.
    Please!! let me know how / what you would do to resolve this. I don't understand why I have previously been able to boot from this same file on the same drive previously to repair my disk / permissions but cannot do so now. FWIW, I tried placing the file (OSX) on my external HDD to boot from, this did not work either (USB HDD).
    Thank you in advance for your input!!

    It isn't clear what you mean about your HD being trashed or which disk (HD or USB drive) you are trying to repair, but either way you need to start up from your Snow Leopard installer DVD & instead of installing anything go to the Utilities menu & run Disk Utility from there to repair either or both of the disks.

  • Power Mac G4 400 MHz (AGP graphics) will not boot from hard drive

    I have a Mac G4 400 MHz (AGP graphics) Machine Model: PowerMac 3.1 CPU Type:PowerPC G4 (2.8)
    When I try to boot from the hard drive I get the folder with the flashing question Mark. The Machine will start up from the OSX 10.4 installer disk.
    The system was running OSX 10.4.9 fine. I began to have problems with the hard drive, so I replaced it with an old Maxtor 5T040H4 40Gig Apple branded drive that I had sitting around.
    The drive is jumpered (r50) for Master/Single.
    I erased the drive in the old G4 using disk utility and wrote all zeros. I then used my store bought Tiger 10.4 install disk to install 10.4 on the drive.
    After restarting I still get the flashing question mark. If I leave the Install disk in the DVD drive the system will attempt to install again.
    I have zapped the PRAM, pressed the CUDA button, removed the battery and let the system sit unplugged for over and hour and it still will not boot from the hard drive.
    To test the drive I removed it and put it in a Granite Digital firewire enclosure and connected it to another mac. The drive shows up and the system appears to be installed correctly.
    What am I forgetting to do? Does anyone have any suggestions.
    Thanks in advance.
    Wesley G.

    Hi! If Tom's solution doesn't work I would reboot from the install disc and then partition the drive as 1 partition instead of erasing it. Sounds like the driver on the disk is too old and installing a new partition map should write a new driver to the drive that is compatible with Tiger. Other than that it is possible that the drive has a spin delay jumper enabled and the drive isn't spinning up fast enough and the computer isn't looking long enough for the drive. Tom

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