PowerMac G5 dual 2.00 GHZ not booting up, 3 blinking lights, fans running high

Discussion in 'PowerPC Macs' started by colin348, Sep 26, 2018.

  1. colin348 macrumors member


    Aug 5, 2018
    sucks cause I literally got it 2 days ago in working condition

    Edit: I read it may be a problem with the logic board or the RAM. Not really sure though
  2. pl1984 macrumors 68020

    Oct 31, 2017
    Unfortunately your research is correct, it's a problem with the logic board. To confirm you can try pressing down on the board in the center of the box I've highlighted and it'll probably boot. You can replace the motherboard or attempt one of the "reflow" repairs (heating the area with a heat gun or pulling the motherboard and putting it into an oven) but those are, at best, temporary.

  3. LightBulbFun macrumors 68000


    Nov 17, 2013
    London UK
    Before you jump to extremes

    may I recommend re-seating the existing RAM or trying some other RAM before you pull out the motherboard and try and reflow the chipset?

    because 3 beeps is No RAM passes POST

    and yes while it is a symptom of a failing memory controller on a G5, you could also just have bad RAM
  4. Project Alice macrumors 6502a

    Project Alice

    Jul 13, 2008
    Post Falls, ID
    I second this G5s are also very picky about RAM.

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3 September 26, 2018