Power Mac G5 Not Turning on :-(

Discussion in 'PowerPC Macs' started by iAdvisorUK, Apr 6, 2013.

  1. macrumors newbie

    Apr 6, 2013
    I'm new here so I apologise for being a noob, but anyway I recently had to dismantle my Power Mac G5 in order to repair the damaged case.

    I had to remove the RAM, the two CPUs and heat-sinks, disconnect the PSU from the motherboard and remove that metal plate that sits on top of the power supply.

    After all this I released I didn't need to go any further and did the repair to the case ONLY. I then reinstalled the processors and connected everything back up, and replaced the FX5200 with a Nvidia GeForce 6800 Ultra.

    I plugged the power cable back in and pressed the power button on the front I/O, nothing happened, no LED, no chime, no fans, nothing.

    I've read elsewhere that it could be the battery but the fact I removed the CPUs and disconnected the power supply seems like a more likely cause of the problem.

    Any help would be greatly appreciated,

  2. macrumors regular

    Sep 3, 2006
    Mine would not start once after changing video cards.

    What ended up seeming to work was to remove and replace the little battery.

    I know it sounds too simple, but it did the trick for me. Good luck!
  3. macrumors 6502

    Mar 12, 2012
    Try the battery thing, or it could be the power supply is shot. I have had that issue on my G5, thankfully it was within warranty.
  4. macrumors 68000


    Nov 15, 2012
    Seems like this was a result with repairing, so unlikely that the PSU would die at the same time.
  5. macrumors 6502


    Sep 30, 2011
    Prague, Czech Rep.
    Static electricity is a bitch...

    Or, you forgot to plug in some connector.

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