Previous 1 26 27 28 29 30 Next 499 Replies Latest reply: Nov 27, 2015 11:54 AM by Linda Cameron Go to original post Branched to a new discussion.
  • Firehawk911 Level 1 (0 points)

    Add me to the list: :(

    Early 2008 Mac Pro 8 core (2x2.8 Ghz Xeon) 20 GB RAM, nvidia quadro 4000, booting to win 7 64 bit using bootcamp and also 10.7 Lion.


    Was very intermittent at first. Most days I have to just sit and wait maybe 30 minutes for it to get over it's restarting fits before trying to do any work. Yesterday it started up and worked fine for hours with no problem. Today it's restarted 6 times in 15 minutes approx.


    Ive got a ton of work I need to do and spent a lot in hopes of using this thing several more years and now this happens. I bought it new but rarely used it until 2 years ago and used it heavy for the last year. Just finished installing new HDD, GPU, matrox mini  and OS less than a year.


    Sounds like the logic board and /or PSU end up being the fix.

    Any recommendation where to buy the parts?


    I found one place selling the logic boards for around $600 I believe, but you send your old one in as a core.

    Any ideas?

  • Robert P Level 1 (35 points)

    I would try the easy things first, check to see if you have bad ram,

    usually an led will light up on the ram board which will identify the faulty ram if any


    I have the same 2008 Mac Pro, and new ram solved the problem, no restarts in 2 years

  • Grant Bennet-Alder Level 9 (55,345 points)

    any stored kernel panics?


    Mac OS X: How to log a kernel panic


    If so, cut and paste the text of a recent one here.

  • Firehawk911 Level 1 (0 points)

    Wow thank you guys for chiming in. I'm so out of my league and wanting help!


    That RAM is like $300 each. I bought some corsair back in 2010 to get it up to 20GB from the original RAM it also still has in it. 800 ghz DDR 2 FB DIMMs 72 bit wide 240 pin.


    Since I run it mostly in bootcamp windows 7 64 pro do I need to boot it in osx and let it restart there to log a kernel panic?


    How do I check ram? Open the case, turn it on, look for the lights?

  • Cacus Level 1 (30 points)



    I don't know who much of the thread you've read so you may have read me say this but. I had issues with the mac shutting down after about 10mins from starting up nearly every time.


    Now this was shorly after adding a SSD any how I removed all PCIe cards and RAM cards etc blew the dust off everything with compressed air. (if you do this be carefull not to hold the can so it 'frosts" the board. Any how one of the things I did was remove the small flat batter from the mother board that keeps the PRAM alive. left the unit for an hour 'to sit power dead' and after which I installed a fresh PRAM battery. Then booted and ran with only the minimum number of PCIe cards in. After it behaved for a week I added one of the other PCIe cards ran it a few days and then added another etc etc . Obviously I appreciate that you may need the all the cards sooner than I did. Any how it worked fine. (Oh and to be fair I think I reinstalled the os starting from scratch. A ball ache I know but I was pulling my hair out and this was a last ditch attempt.


    Now it worked for probably 6 months or more. Recently I added another SSD after which it was doining it again but not as frequent. As I had a Apple RAID card installed which also uses a battery I replaced this and ran for a week with no external devices attached (of which I have a few). Again did this for a week and no probs reattached everything and now it's fine.


    The CR32 (or what ever the battery is) is only a few quid and you have to remember that it's been in their 5 years or more and this could be upsetting the power management unit as the voltage fluctuates.


    Also after you reconnect everything make sure your cables are well connected - t occured to me that as Id moved things about after the second SSD I may have worked lose an external sata cable or something.


    Hope that give you a few 'cheap options to try'.


    Incidentaly there are some LEDs on the logic board and a small button you can press (with a wooden stick! - non conductive!) to run some hardware diagnostics. I can't remember were abouts on the apple site the support info is but that may tell you if theirs a logic board problem.


    Best of luck


  • Robert P Level 1 (35 points)

    yes there are 4 red LEDs in a line on each ram daughterboard, these should come on briefly when you start the computer then quickly turn off


    if any stay lit then it means that the associated ram module is faulty

  • Firehawk911 Level 1 (0 points)

    Thank you very much. Last week when the problem got worse i had some extra fans going in my house circulating air to try to aid in cooling and it stirred up some dust as evident on all my furniture. No doubt extra dust was sucked in the mac too. I will unplug it, open it up remove components and blow everything out as well as buying a new battery. Ill also watch the RAM lights before I close it up.

    The only things installed are:

    1 Sata HDD windows / osx

    1 Sata HDD windows media

    1 sata HDD windows media

    1 sata HDD Mac media

    1 PCIE pny nvidia quadro 4000 for mac

    1 PCIE connection card for external matrox mx02 mini max


    As soon as I have a crash panic log file I'll post it.

    I sure hope this thing can be remedied (especially without needing a new board or PSU).

  • flifrommiddlesbrough Level 1 (0 points)



    This has to be software issue as I have replaced RAM, Re-installed OS from clean HDD & and even went to the exstent of replacing the HDD.

    My MBP (2010) dual boot with Windows 7 Ultimate 64-bit that has not crashed EVER its just SOLID. I find my MBP randomly restarts MORE when im changing between offices and use differant networks, I have also started getting somtimes permition errors on home folder?


    It's very dissapointing that a Microsoft OS runs without FAIL day in and day out on Apple's hardware but Apple's OWN software is a glitchy as johnny mnemonic's over stacked brain :-(



  • Bradley Dichter Level 1 (40 points)

    You seem to have not noticed this discussion is supposed to be about the honking big tower desktop Mac Pro and not about your little MacBook Pro. Never the less, I'll throw you a bone. Mac OS X can spontaneously restart if Rosetta gets overloaded. That assumes you are running something before OS X 10.7 which does not have Rosetta. This scenario also assumes you still have some PowerPC coded extensions, frameworks or applications that are coded thusly. Use the System Profiler and click on the various categories under Software to scan for PPC apps, extensions and frameworks. Delete them and update software to not use them. The system software could be damaged. booting off an external volume and deleting your system and library folders and then reinstalling can help in these cases. Also your MacBook Pro could be overtaking the CPU or GPU under the Mac OS and not under Windows and it overheats and restarts. There are plenty of faulty GPUs in MacBook Pro models. I suggest you use Console to review your logs to help point you in the right direction.

  • Grant Bennet-Alder Level 9 (55,345 points)

    As soon as I have a crash panic log file I'll post it.

    As described in the article, previous panic logs are saved, and can be read out with If you don't find them in the log file referenced, older "rolled over" versions of those logs are right there with a numeral in the last digit of the filename.


    Post one of theose "suicide notes" and we can help you get on your way to a solution.

  • Firehawk911 Level 1 (0 points)

    Thank you. I looked and the only crash messages I saw were two old ones: final cut studio and another program, primers primers PTZ printer program I believe. Both from many months ago.


    I'm covered up with work (110+ hrs a week)and as another user did, have resorted to just leaving it on because I can't shut it down and mess with it until I can squeeze a chance in. Thankfully it has stayed on and worked for several days straight. I think he said he left his on for a couple months! :)

    I hope it will hang on long enough til my workload gives me a chance to shut it down and try all this great advice.


    Can anyone confirm if it uses a cr2032 battery so I can have one ready in advance?


    Thank you again. I sure hope this thing can be straightened out

  • Grant Bennet-Alder Level 9 (55,345 points)

    Can anyone confirm if it uses a cr2032 battery

    The specified battery is a BR2032, which has wider temperature range and much longer life. A new battery measures about 3 Volts in your hand, and they "helpfully" have a tendency to "fall off a cliff" in their Voltage readings when dying, so you can more easily recognize a bad one.


    The CR2032 can be used in a pinch.

  • Firehawk911 Level 1 (0 points)

    Thank you, Grant.


    I'll find a BR2032. Good to know.

  • Strigidae Level 1 (0 points)

    My problem was similar. app on my macbook was getting overloaded, and started arguing with the O.S. I got ride of the app and my computer stopped restarting.

  • baronial Level 1 (0 points)

    I have had this spontanious rebooting session problem twice in the last 10 years or so and both times it was due to a faulty USB hub. Easy to check - just circumvent your hub and if it cures the problem buy a higher quality hub. There are some published tests and ratings of hubs -  start there.

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