Results 1 to 6 of 6
  1. #1
    Mac Pro won't turn over

    Member Since
    Mar 06, 2011
    Posts
    2
    Mac Pro won't turn over
    My 2006 Mac Pro 1,1, won't turnover on power on. CPUa/b overtemp lights illuminated on logic board along with only trickle power. No other diagnostic lights turn on including power on, which leads me to suspect I have a PSU malfunction.

    I posted a YouTube video of the problem:

    YouTube - Mac Pro 2006 Boot Issue

    I'd appreciate any feedback!

  2. #2
    Mac Pro won't turn over
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    45,176
    Specs:
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, Yosemite
    Nice video explanation. I wish everyone would do that - makes it a lot easier to offer assistance.

    I'm no expert when it comes to a Mac Pro but it does seem like your PSU has problems. I'm not sure where you can buy a new power supply for your Mac Pro but the first place to try is the folks at ifixit. iFixit: The free repair manual If they don't have one in stock try Powerbook Medic.

    I believe both resellers allow returns if it should turn out to be something else.

  3. #3
    Mac Pro won't turn over
    BrianLachoreVPI's Avatar
    Member Since
    Feb 24, 2011
    Location
    Maryland
    Posts
    3,733
    Specs:
    March 2011 15" MBP 2.3GHz i7 Quad Core 8GB Ram | Mid 2011 27" iMac 3.4 GHz i7 16 GB RAM 2 TB HDD
    I know jack diddly squat about Mac Pros - although it's a beautiful machine. I will say, however, that I had several PSUs go on me back when I had windows machines - happens all the time. Did you check with a simple voltmeter to see if you're getting the expected voltages from the PSU? Again - I don't know about Mac Pros specifically - but my old Windows boxes I could just pull the PSU - and check for the expected voltages. I would imagine you could do the same in this case to validate your concern - just as a next step?

  4. #4
    Mac Pro won't turn over

    Member Since
    Mar 06, 2011
    Posts
    2
    I'm really hoping it's the PSU. I have it apart at the moment looking for any blown fuses and capacitors. I do have a multimeter but am at a bit of a loss of how to test. Any suggestions?

  5. #5
    Mac Pro won't turn over
    BrianLachoreVPI's Avatar
    Member Since
    Feb 24, 2011
    Location
    Maryland
    Posts
    3,733
    Specs:
    March 2011 15" MBP 2.3GHz i7 Quad Core 8GB Ram | Mid 2011 27" iMac 3.4 GHz i7 16 GB RAM 2 TB HDD
    Did you do a PRAM reset as described here? Apple - Support - Discussions - Mac pro won't boot ...

    Regarding testing for voltages - I don't know enough about which voltages that PSU provides and on what pins to help. If you don't find the voltages - that's very telling - however, if you do, it still doesn't rule out the PSU as you may have the PSU shutting itself down under load.

  6. #6
    Mac Pro won't turn over
    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    20,004
    Specs:
    iMac i5 2.7GHz, 16GB memory, OS 10.10.5
    PSU from your description and should set you back about $500 at an Apple reseller or do it yourself much cheaper. My Mac Pro sat in a storage container in LA prior to shipping to Australia for two years and the PSU had to be replaced. Here is one who supply the unit and instructions:-


    http://www.mac-pro.com/s.nl/it.A/id.5316/.f
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Mac Pro Won't Turn On
    By JasonCK in forum Apple Desktops
    Replies: 2
    Last Post: 02-01-2013, 03:24 PM
  2. Mac Book Pro Won't Turn on?!?!?
    By whobebubba3 in forum Apple Notebooks
    Replies: 2
    Last Post: 11-03-2011, 01:54 PM
  3. Replies: 3
    Last Post: 09-12-2011, 01:33 AM
  4. My macbook pro won't turn on
    By ymc in forum Apple Notebooks
    Replies: 2
    Last Post: 05-29-2011, 09:53 PM
  5. Mac Book Pro won't turn on
    By Singapore in forum Apple Notebooks
    Replies: 1
    Last Post: 09-21-2010, 08:38 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •