Mac pro locking up

Discussion in 'Mac Pro' started by PmattF, Sep 13, 2008.

  1. PmattF macrumors member

    Dec 28, 2006
    I have a first gen Mac pro, I am getting a sporadic lock up where the screen freezes, and it stops responding to keyboard and mouse input (and it becomes inaccessible from the network). This has happened in normal use twice.

    I have tried several times to run the Apple Hardware Test off the original Os X disk, but it locks up up every time in that mode. It also locks up immediately when I boot into single user mode (which I did in order to attempt to run memtest). At least it refuses keyboard input in Single User (with my normal bluetooth keyboard, as well as a USB keyboard that I borrowed).

    I did run memtest from a terminal window while logged in normally, and it was able to access 11 of my 12 gigs of RAM, and it passed, so I guess I am 11/12ths sure it is not bad RAM.

    When the system does lock up, when I do a hard power cycle with the button on the front of the machine, it will not reboot -- my screen remains black. If I let it sit for a minute or two like that, then power cycle again, it does boot up normally. This is very consistent on these lockups - no boot the first time, works fine the second.

    In general, I think it is running hotter than it used to -- at least it seems like the fans are running at high speed more than they used to, but I can't swear to, or quantify that.

    I was on the phone with Apple tech support for about an hour yesterday, and he finally decided it had to be taken in for service.

    I wanted to see if anybody here has any ideas what the problem might be, especially if it is something I could fix myself, before I lose the machine for however long it will take Apple to fix it.
  2. kalex macrumors 65816

    Oct 1, 2007
  3. matt321 macrumors member

    Oct 27, 2007
    Do you have anything plugged into your I/O ports? USB, Firewire, etc...? I know that I have had issues in the past with iPods and a USB headset. You might try unplugging everything except Ethernet to see if that solves your problem.
  4. PmattF thread starter macrumors member

    Dec 28, 2006
    I ran DiskWarrior and everything is working way better in general -- I hadn't realized quite how many spinning beachballs I was seeing until now that I am not seeing any.

    The total lock up (which did not involve a beachball) was so sporadic that it is hard to say whether that is fixed, but I am keeping my fingers crossed.

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