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G5 won['t boot

3320 Views 14 Replies Latest reply: Sep 25, 2008 6:42 PM by David Roland RSS
SAMMYKIM Calculating status...
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Sep 5, 2008 10:03 PM
G5 dual 2.0, the first ones that came out. When I press the power button, the button lights-up but goes out when i let go. The fans are spinning, but that is it. Also, if i lift-up the plastic cover a red light on the logic board comes on untill I close it. have removed all cards and ram except for original two sticks. Have removed the battery and it has a good read on my volt meter. Put battery back in and reset the PMU button on the main board. Is this a power issue or a logicboard issue? anything else I can try? thanks...
g5 dual 2.0 PPC
  • Samsara Level 4 Level 4 (1,320 points)
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    Sep 5, 2008 11:50 PM (in response to SAMMYKIM)
    The status light flashes and the computer won’t start up.
    If you recently installed additional memory, a PCI expansion card, or another internal
    component, make sure that it is correctly installed and that it is compatible with your
    computer. See if removing it allows the computer to start up.
    If the status light still flashes, determine the number of flashes to identify the
    problem:
    2 flashes: no RAM installed
    3 flashes: incompatible RAM installed
    4 flashes: no good DIMM banks
    5 or 6 flashes: contact Apple or an Apple Authorized Service Provider

    Trying finding your manual on this and maybe you'll be able to find some useful info:
    http://support.apple.com/manuals/#powermac

    Good luck
    PowerMacG5 Quad 2.5, 16 gig RAM, Velociraptor HD, 7800GTX, 20 in. Cinema Display, Mac OS X (10.5.4)
  • Samsara Level 4 Level 4 (1,320 points)
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    Sep 6, 2008 3:43 PM (in response to SAMMYKIM)
    Nice to have a good old reliable G4 as a backup machine.

    I don't know anything about the cable but I'm sure someone here should. In case I missed it did you do anything to your G5 right before all this happened? Installed new RAM, for instance.

    You need to have that plastic cover in place in order for your mac to run properly, so the light you're seeing when its out is normal.

    Well, unless others will chime in you seem to have enough problems that a trip to an Apple Genius may be in order. Seeing him should be free so make sure you don't pay anything. If you decide to get it repaired get an estimate first. Hopefully it will be something simple.
    Sorry that I personally couldn't help you. I wish you the best of luck though, I know how frustrating going through something like this can be.
    PowerMacG5 Quad 2.5, 16 gig RAM, Velociraptor HD, 7800GTX, 20 in. Cinema Display, Mac OS X (10.5.4)
  • Samsara Level 4 Level 4 (1,320 points)
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    Sep 6, 2008 11:08 PM (in response to SAMMYKIM)
    Yeah, that's right, you have to make an appt. first, forgot that. And yeah, I too have a PM8500 and a G4 that still work fine. However this is my third G5. Makes one wonder how the Mac Pros will do. Probably better actually, the G5s just seem to run too hot.

    You may end up being better off taking it to a local repairer instead of an Apple store.
    http://support.apple.com/kb/HT1434?viewlocale=en_US

    But you might to do a little research on the net to get some idea on what may lie ahead and options. Here are some links I threw together for another guy just a night or so ago. Check the top one first then see if there's anything you find interesting in the others. Of course you can find all sorts of stuff on ebay, though it's a bit chancy.

    http://www.mac-pro.com/

    http://www.dvwarehouse.com/Power-Mac-G5-Logic-Boards-c-245_1074.html&pltid=eb251 3bba25051a19bfb70ef91ea73bb

    http://www.dttservice.com/appledesktops/powermacg5.html

    http://www.galaxyhp.com/PMG5/notes_pmg5.html

    http://cgi.ebay.com/Apple-PowerMac-G5-Dual-2-3-GHz-2-GB-RAM-250-GB_W0QQitemZ1702 59274060QQihZ007QQcategoryZ111418QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

    Message was edited by: Samsara
    PowerMacG5 Quad 2.5, 16 gig RAM, Velociraptor HD, 7800GTX, 20 in. Cinema Display, Mac OS X (10.5.4)
  • pcjet Calculating status...
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    Sep 12, 2008 12:38 PM (in response to SAMMYKIM)
    I just want to add that I have the identical same problem. I've already replaced the Power Supply and it didn't help one bit. I am resigned to believe it is indeed the logic board, but like many, I don't think I could afford it.

    There sure seems to be quite a few problems with the G5 in this area! I've had PCs that last a lot longer than this G5 did.
    G5 PowerMac, Mac OS X (10.5.4), Dual 2GHz Processors, 2GB Ram, no upgrades, no additions
  • David Roland Calculating status...
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    Sep 12, 2008 6:53 PM (in response to SAMMYKIM)
    Try removing the video card and booting up, just to rule out the possibility. The plastic cover is part of the cooling system. Reminiscent of a wind tunnel is created when it is in place. Removing it causes the fans to spike into overdrive to provide additional cooling.
    Dual 867 Quicksilver, PM Dual 2ghz (2003), Mac OS X (10.5.4), DVD Ram, Apple Studio Display 17"
  • Samsara Level 4 Level 4 (1,320 points)
    Currently Being Moderated
    Sep 23, 2008 2:24 PM (in response to SAMMYKIM)
    Hi Iconandy,

    Very cool, though its still a costly repair. Yeah, Apple doesn't really fix anything... they just replace components, and they do that far more expensively.

    Yes, please post back and say how you made out. I may have to use that company myself one day. Good luck!
    PowerMacG5 Quad 2.5, 16 gig RAM, Velociraptor HD, 7800GTX, Electron22blueIV CRT, Mac OS X (10.5.5), 20" Cinema Display, Geforce 6600, Western My Book, Seagate Free Agent Pro
  • mister rich Calculating status...
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    Sep 25, 2008 4:16 PM (in response to Samsara)
    All this is happening to me and my G5 Dual 2.0 (Nov 2004)...

    I have replaced the HD, put in two new RAM sticks and reinstalled the (never used) original Video Card.

    Still will not boot. Three flashes. I sometimes get it booted but it crashes real quick.

    Is this place DT & T in New Jersey by any chance?

    Thanks,

    Richard
    MacPro and G5, Mac OS X (10.5.4)
  • David Roland Level 3 Level 3 (515 points)
    Currently Being Moderated
    Sep 25, 2008 6:42 PM (in response to mister rich)
    Hi mister rich,
    Three flashes indicates incompatible ram, however, it has been my experience that the the logic board is bad. First, remove all but the factory ram and see if it boots. I recently had the same problem and fixed it analog style. Look for my posts and you will find my solution to this.

    Regards
    Dual 867 Quicksilver, PM Dual 2ghz (2003), Mac OS X (10.5.4), DVD Ram, Apple Studio Display 17"

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