Power Light Indicator blinks 3 times at start up... what do I do?

Discussion in 'Mac Pro' started by JT the Beard, Jan 16, 2009.

  1. JT the Beard macrumors newbie

    Feb 10, 2008
    Pittsburgh, PA
    Hey everyone,

    I tried searching and couldn't find anything on this, so maybe someone can tell me what's wrong...

    I recently received a Power Mac G5 from work. They told me I could have it, but reformatting the hard drive and reinstalling the OS was on me. So, I took it home, and plugged it in to turn it on, and the white light on the front blinks 3 times and then stays steady... and then blinks 3 times again... and so on and so on.

    The RAM that came with it was bad, so I put in 2, 1 GB PC3200 sticks in it. Isn't it a RAM problem? Please advise me if you can. I appreciate it very much. Thanks!
  2. Dragonforce macrumors 6502a


    Apr 9, 2008
    London (Ealing) UK
  3. propictrix macrumors newbie

    Jul 15, 2013
    I had this same issue on a MacBook Pro... looked up the codes for the blinking here:

    It suggested the RAM was an issue. I took off the plate and sure enough, one of the RAM cards looked like it had come out a bit (I'd just been doing a lot of traveling, so the machine certainly took a few padded jolts...). After re-seating the card and a restart, it seems fine, and has been on 24 hours without spontaneous shut-down.
  4. GermanyChris macrumors 601


    Jul 3, 2011
    Thread necro ;)

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