1 2 Previous Next 21 Replies Latest reply: Jun 22, 2013 5:16 PM by Farzad_K
Farzad_K Level 1 Level 1 (0 points)

Hi,

 

I have recently installed iStat Pro vigget on my MBP 1st Generation to monitor its temperature. Of the two fans only one is reported as running. Is there any utilities on the macine itself that can verify this for me? Is it normal for only one fan to be running maybe until it needs to?

 

Thanks.

 

Farzad


MBP, Mac OS X (10.5.8)
  • 1. Re: MBP 1st Gen. Only One Fan
    eww Level 9 Level 9 (52,975 points)

    What is the Model Identifier of your MBP, as shown in System Profiler > Hardware Overview? It will be a two-digit number in the form "X,Y".

  • 2. Re: MBP 1st Gen. Only One Fan
    Farzad_K Level 1 Level 1 (0 points)

    It is 1,1.

     

    I checked the Firmware yesterday and it is up-to-date.

     

    Good news is that at least one fan is reported as working - and I do hear it when it really speeds up.

     

    Opening this machine and replacing the fan is a pain in the neck.

  • 3. Re: MBP 1st Gen. Only One Fan
    eww Level 9 Level 9 (52,975 points)

    Your MBP has two fans, as the top photo on this page shows:

     

    http://www.ifixit.com/Guide/Repair/MacBook-Pro-15-Inch-Core-Duo-Model-A1150-Logi c-Board-Replacement/498/4

     

    Unfortunately, I don't know whether both are always supposed to run simultaneously.

  • 4. Re: MBP 1st Gen. Only One Fan
    Farzad_K Level 1 Level 1 (0 points)

    Yes, thanks.

  • 5. Re: MBP 1st Gen. Only One Fan
    Allan Jones Level 7 Level 7 (30,435 points)

    I also have a 1Gen MBP (MacBookPro3,1--or "Late 2007') and have used iStat Pro since the computer was new. Mine has never showed only one fan running. I think you've had one die.

     

    The downsides to not fixing the fan are:

     

    1. The functional fan will have to work harder and could also fail from shearexhaustion.

    2. Cooling with one fan is inefficient and  could cause an overheating failure of components normally served by the non-working fan.

     

    If you live in North America, ask for a "Depot Repair." Instead of fixing the computer in the shop where you'll get a charge of from US$700-$1100 for, say, a logic board, they will send it to a central refurb facility for repair at a flat charge of about US$315 plus shipping to fix anything that's wrong as long as the case does not show signs of physical abuse or drowning (beer stains under the keyboard kills the deal).

     

    A depot repair takes longer that the in-store repair (usually about one business week) but the cost savings is well worth the wait. Most people here who have exercised this option report getting the computer back in about one business week and are very happy with the outcome.

  • 6. Re: MBP 1st Gen. Only One Fan
    Farzad_K Level 1 Level 1 (0 points)

    Thanks.

     

    For $300 I think I will replace it myself. I upgraded the internal hard drive myself too.

     

    The question now is "what is bad - the fan or whatever is supposed to turn it on!"

     

    Hopefully I will be able to find a diagnostic software or something to check it out.

     

    Farzad

  • 7. Re: MBP 1st Gen. Only One Fan
    Allan Jones Level 7 Level 7 (30,435 points)

    "The question now is "what is bad - the fan or whatever is supposed to turn it on!""

     

    A very good question indeed. Various sensors control the fans. Apple Hardware Test (AHT), which came on one of the optical disks packed with your computer, will detect bad sensors. Although the codes are cryptic and no one has even posted a list of codes with their significance, I know that sensor failure codes from AHT have the letters "SNS" embedded in the code. A bad fan motor is a different code but I can't remember it at the moment.

     

    A bad sensor is probably not as easy a DYI project as a dead fan.

     

    Hopefully the fan is simply clogged with dust or needs lube. I had a tiny cooling fan on a old video card seize up. ATI could not supply a replacement so I removed the fan, peeled off a sticker and found myself looking at its bearings. I lubricated it with---wait for it--trombone slide grease! It's a very light and clean product. The fan stopped it whining (literally) and is still working today, many years after my misguided repair

  • 8. Re: MBP 1st Gen. Only One Fan
    eww Level 9 Level 9 (52,975 points)

    A fan failure will be reported by AHT as a code including "MOT". Running AHT would be well worthwhile. There is no other publicly-available diagnostic software to use.

  • 9. Re: MBP 1st Gen. Only One Fan
    Farzad_K Level 1 Level 1 (0 points)

    Okay, I tried restarting with SL in the drive while pushing D. Nothing happens. It just starts. Should I use the original install media from back when I first bought the computer or the SL DVD should work?

     

    What is AHT?

  • 10. Re: MBP 1st Gen. Only One Fan
    eww Level 9 Level 9 (52,975 points)

    Apple Hardware Test (AHT) is proprietary hardware diagnostic software, found on one of the DVDs that were originally shipped with your machine (the disc label will tell you which one it's on). Because it's machine-specific, it's not present on any other disc. So find the disc that contains it and start up from that disc while holding down the D key on your keyboard until the AHT startup screen appears. Run the short test, and if no error shows up, run the extended test. Post back with results.

  • 11. Re: MBP 1st Gen. Only One Fan
    Farzad_K Level 1 Level 1 (0 points)

    Okay, thanks. I figured it had to be the DVD that came with the computer since it is specific to the computer.

     

    Any way, bad news is that I did the AHT and got:

     

    Failure Code:          4MOT/1/40000002: Left_Middle-Front

     

     

    Does this mean it is the physical fan itself or could be a sensor?

     

     

    Any idea where I can order the fan from?

     

    Thanks for the help.

  • 12. Re: MBP 1st Gen. Only One Fan
    eww Level 9 Level 9 (52,975 points)

    That's the fan itself. Where are you located?

  • 13. Re: MBP 1st Gen. Only One Fan
    Farzad_K Level 1 Level 1 (0 points)

    I am in the US, State of Washington, Seattle.

     

    How do I get a model number for this fan so I can look for a replacement part?

     

    And I will be replacing both.

  • 14. Re: MBP 1st Gen. Only One Fan
    eww Level 9 Level 9 (52,975 points)

    Contact any or all of the following parts suppliers:

     

    http://www.pbparts.com  (parts and repair work)

    http://www.dttservice.com  (parts and repair work)

    http://www.powerbookresq.com  (parts and repair work)

    http://www.tekserve.com  (parts and repair work)

    http://www.powerbookmedic.com (parts, repair work and instructional videos)

    http://www.welovemacs.com (parts and used equipment)

    http://www.ifixit.com (parts and excellent, illustrated online take-apart instructions)

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