Mac Pro won't boot or chime after power surge

Discussion in 'Mac Pro' started by parkds, Oct 30, 2012.

  1. parkds macrumors 6502

    Jan 23, 2003
    I have an eight-core 2,1 Mac Pro that is plugged into an UPS unit. Tonight the building I live in had a series of power surges that knocked out my UPS and Mac Pro. Once the power stabilized, I tried to turn the Mac back on without any luck. When I press the power button the computer's fan and hard drives start up and the graphics card's fan spin at high but the computer does not chime, the screens do not turn on, and the keyboard receives no power. The power light remains solid after I turn the computer on. I have tried unplugging the computer for a while, replacing the graphics card with another card, and going through the RAM pair by pair. Nothing seems to cause any different behavior. I have not been any issues with the computer before this. Please help with any ideas.
    I do freelance production work for a living so this is a serious issue for me.

    Thank you so much.
  2. bax2003 macrumors 6502a


    Dec 25, 2011
  3. Spacedust macrumors 6502a

    May 24, 2009
    Try resetting SMC and nVRAM.
  4. parkds thread starter macrumors 6502

    Jan 23, 2003
    I left the computer unplugged overnight to try to reset the SMC and I cannot get the keyboard to power up to do a nVRAM reset. It there another, hardware method to do these resets on a 2,1 Mac Pro?

    Regarding it being a fried logic board...what a disaster if true. Anybody have any experience with having a logic board replaced in a 2,1 Mac Pro and have any idea regarding costs? Don't want to spend a lot of money on hardware when new Mac Pros are supposedly coming next year.
  5. donw35 macrumors regular


    Jul 3, 2010
    Los Angeles
    my G5 had the same problem and fixing it was not cost effective, I didn't want to buy a replacement at the time because the updated Mac Pro's where coming out, so I built a Hackintosh to get me by until the new model came out, every time it was announced I thought, well, the hack is working and the new specs didn't have what I wanted, its been 4 years now. it could be the logic board and it could be something simple but in my experience no matter what it is, its going to cost. if dead another option could be to find a used MP and use it to get by and sell it when the new ones come out.

    I recommend if you are going to mess around trying to get it to start up that you remove your hard drive to minimize data lose.
  6. TriathlonT macrumors newbie

    Jan 25, 2013
    MacBook Pro wont boot or chime


    I read your post about your Mac that wouldn't boot or chime. Exactly the same happened to my Intel MacBookPro a year ago. For a while it would still charge my iPod without the screen working and then stopped doing that. I let the power run down and then connected it to a power supply a week ago -- this time it started up perfectly, even the screen-saver was the same as before and all my files and folders were there -- it was like nothing ever happened. I left it on 'sleep' for 24 hours and then started working with it (as usual it got quite hot), I left it on 'sleep' again and this time the screen went again and it was back to the same problem.

    Did you manage to fix the problem you had and did you find out any ways of trying to fix it? I hope your Mac is now okay and would appreciate any advice you have. Thanks.
  7. AjeeB macrumors member

    Mar 29, 2010
  8. spork183 macrumors 6502a


    Jul 30, 2006
    Just a couple things unrelated to computer:
    1. your UPS likely has a guarantee that it will protect your computer. I know APC has a 3year, 75,000 equipment guarantee.
    2. Check if you have a claim with the power company. Outage at my house a few years ago fried my printer, surge protector and modem (yeah, I did say a FEW years ago...). Power company ended up replacing them all because of a huge backsurge when the power came on.
  9. CaptainChunk macrumors 68020


    Apr 16, 2008
    Phoenix, AZ
    In terms of costs, a new logic board for your machine is $600-700 (just the board). But that's assuming that's the only thing that got fried. An Apple Store may be able to perform the repair at a flat rate, too.
  10. ctucci macrumors regular

    Dec 16, 2008
    Yer Mom's basement.
    According to Apple ( ) a bad mainboard battery can lead to some trouble. I think your mac might be old enough that the battery could be bad?

    It's looks like they are those inexpensive CR2032 batteries. Replacement instructions:,d.dmQ

    Might be worth a look, at any rate -

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