Mac Pro won't start :(

Discussion in 'Mac Pro' started by kublaiboy, Jan 10, 2012.

  1. kublaiboy macrumors member

    Sep 5, 2009
    My Mac Pro(late 2008/early 2009 2.8Ghz 8core) was working fine last night. It won't start this morning after I pressed the power button. The screen is black and the white LED above the power button is blinking. I unplugged external accessories(FW/USB), still the same thing. What's going on? :(
  2. wonderspark macrumors 68040


    Feb 4, 2010
    Sounds like it's in sleep mode. Did you press a key on the keyboard yet?
  3. kublaiboy thread starter macrumors member

    Sep 5, 2009
    No, it's not in sleep mode. Pressed all the keys, space bar and mouse buttons. Still black screen, blinking light above power button.
  4. rroselavy macrumors newbie

    May 20, 2011
    May be bad RAM inside the computer, wrong RAM type or RAM that is installed improperly.

    Take all the RAM out and reinstall one matching pair at a time, in the correct slots, until you isolate the bad ram.

  5. Comeagain? macrumors 68020


    Feb 17, 2011
    Spokane, WA
    Boot holding Command-D. Make sure the display is plugged in all the way.
  6. kublaiboy thread starter macrumors member

    Sep 5, 2009
    Problem found. I took those 4GB OWC DIMM strips out, all four of them. Only has 1GB Apple strip(factory ram) on each of the risers, configuration 1 for my 2008 MP(see attached). The MP boots up beautifully!

    I later found out two of those OWC 4GB DIMMs are bad. The other two are okay. Wonder if I should order replacement from OWC? Advice on better brands at affordable prices?

    Thanks for all the help.

    Attached Files:

  7. Mactrunk macrumors regular

    May 12, 2005
    I had the same problem with my 2008 MP.
    OWC memory died.
    Weird, after 3 years.
    Good news.... if you were the original purchaser there is a lifetime warranty.
  8. nambuccaheadsau macrumors 68000


    Oct 19, 2007
    Nambucca Heads Australia
    As a suggestion email OWC and advise them of your memory problems. They do have a lifetime warranty on their memory. They will email you back a reference code which must be printed on the external of the parcel when you send it to them.

    Lost 2x2GB modules on my Mac Pro. Posted them off and within seven days had two replacement modules f.o.c. air mail to Australia.

    Great service.

Share This Page