G5 2.0 dp no boot, no chime, no power-on light

Discussion in 'Mac Basics and Help' started by fivegrand, Jun 24, 2009.

  1. fivegrand macrumors newbie

    Jun 8, 2008
    Ok, I'm in a bad way on my G5, I'll give as much information as I can.

    What happened: The power went out for about an hour during a storm. I did not have the G5 shut clear down, I only had it asleep (yet connected through a surge arrestor). I have it set to not restart automatically after a power failure.

    After the power came back, the following happens when trying to start it up:

    •No startup chime
    •No sustained power-on light (it only comes on when pressing the button)
    •The fans do their normal startup spinup, but then all fans maintain a medium speed, accelerating to full throttle if left running
    •The hard drives spin up and clatter
    •The monitor shows nothing
    •The USB optical mouse does not light up
    •The machine does not boot (as above, the monitor shows nothing - no gray screen, nothing, it doesn't know that it's connected to anything)
    •No startup chime

    What I've done so far, to no effect:

    •Reseat the RAM cards
    •Blow all the dust out
    •Reset the PMU
    •Attempt to start in THD mode to my iBook (figured it might be worth a shot at least)

    After a few minutes running, I smelled that lovely "hot electronics" smell. I powered it off and pull the power cord, and felt the heat sinks on the processors. The lower heat sink is slightly warm to the touch, the upper is room temperature.

    As best as I can tell via MacTracker, it's a 2005 G5, but I don't know if it's early or late because it's a dual 2.0 with eight ram slots, which MacTracker doesn't show an option for.

    I think it poofed a processor, haven't called a Mac shop yet (I'm away from home), I'm looking for more options/input/things to try that I haven't yet...

    Thanks all...
  2. Hrududu macrumors 68020


    Jul 25, 2008
    Central US
    Thats exactly what my single 1.6GHz model did. I never got a true diagnosis on it, but most people seemed to suggest a burnt out processor or motherboard. I even made a YOUTUBE video about it to see if I could get some help.
  3. fivegrand thread starter macrumors newbie

    Jun 8, 2008
    Next test suggested by my local Mac shop (back at home) was to pull the hard drive connections and try starting it up. They said it should show the sad Mac face (really? In OSX?). Same thing, no joy.

    Looks more and more like a poofed proc. At least I have another G5 back home to fall back on.

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