PowerMac G5 won't power up

Discussion in 'PowerPC Macs' started by MagicBoy, Feb 27, 2015.

  1. MagicBoy macrumors 68040

    MagicBoy

    Joined:
    May 28, 2006
    Location:
    Manchester, UK
    #1
    PowerMac G5 DP that's been in storage for a couple of years. Just connected it up and it won't power on. A relay in the PSU clicks twice when the power cable is attached. Press the switch and the power LED stays on for a half a second, the relay clicks twice and the fans in front of the CPUs twitch and nothing happens.

    I've reseated the RAM and graphics card. No change.
    Removed all but the original RAM. No change.

    Any suggestions?
     
  2. headsh0t95 macrumors regular

    Joined:
    Dec 21, 2013
    Location:
    Netherlands
  3. poiihy macrumors 68020

    poiihy

    Joined:
    Aug 22, 2014
    #3
    Looks like it.
    Do you have another psu to test?
     
  4. MagicBoy thread starter macrumors 68040

    MagicBoy

    Joined:
    May 28, 2006
    Location:
    Manchester, UK
    #4
    Only an ATX one.

    I've seen some PowerMac G5s that had red diagnostic LEDs on them, not sure if this one does. If it does they're not lighting up. It's one of the first ones I think.

    Looks like it's going back on the disposal heap.
     
  5. poiihy macrumors 68020

    poiihy

    Joined:
    Aug 22, 2014
    #5
    Modify the ATX to fit the G5 board. Use jumper wires and/or pins or something.

    Don't throw away the old PSU!! salvage the fan and some parts!! Reuse the enclosure! It has a fan so it would make a good hard drive enclosure! Then recycle the innards if you don't want them.
     
  6. Sergey.P macrumors newbie

    Joined:
    Aug 27, 2013
    Location:
    Finland/Russia
    #6
    Can be that the capacitors in the PSU have dried out, try to warm up PSU with a hairdryer for a test.
     
  7. MagicBoy thread starter macrumors 68040

    MagicBoy

    Joined:
    May 28, 2006
    Location:
    Manchester, UK
    #7
    Worth a try. Storeroom would have been cold and damp. Don't own a hairdryer, I'll try the airing cupboard!
     
  8. Sergey.P macrumors newbie

    Joined:
    Aug 27, 2013
    Location:
    Finland/Russia
    #8
    Indeed it is, but don't overdo it, try to warm up strictly the PSU itself as I don't think the rest of the unit would appreciate being warmed up :)
     

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