FANs:  New MacBook Pro Core 2 Duo Fans OSX 10.4.8  Staying On Always

I just received my MBP C2D and as soon as you hit the power button, the fans come on and don't shut off. Its extremly loud. Sounds like a jet engine. I tried everything to stop it. I installed SMC Fan Control, Fan Control, and Core Duo Temp. The fan controls seem not to affect my fan rpm speed. Core duo temp says my core temp fall between 30C and 45C always. Every few hours (like 4-6 hours) the fan will shut off for 1 sec and then start up again and sometimes stutter on and off. Occasionally the fan will shut off for awhile after like 12 hours, until my MBP goes to sleep and then when it wakes, the fan comes on at full speed and remains on forever. I can shutdown the MBP and as soon as I hit the power button the fans come back on. I ran the apple diagnostics rom cd1 and all passed. I did notice after I entered the test that the fan speed went way down until you could barely hear it but I knew it was on. I suspect that my fans are stuck on at wide open rpm. I wonder if software may have a fault that could cause this. My MBP software is all up to date. Any tricks out there to diagnose this problem or fix it? What is the duty cycle of the fans? Should they come on when you first hit the power button before the OS is booted up? Anyone else with C2D fan problems? Please help!
MacBook Pro 17   Mac OS X (10.4.8)   Ipod Video 5G
MacBook Pro 17   Mac OS X (10.4.8)   Ipod Video 5G

the fan in the c2d model's is designed to be on all the time.
open up smc fan control - if you have no app's open besides smc and your computer is just sitting there idle it is normal for both of the fans to be running at 2000 rpm.
if youre laptop is idle with no apps running and the fans are at 5000rpm+ then i would be conserned, but a simple restart should help in that scenario.
everything you have mentioned is normal.

Similar Messages

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  • Who has a brand spanking new MacBook Pro Core 2 Duo?  Comments?

    Hi,
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    If you want to use Logic, then 15 inch screen is a must. There is not enough > space on the 13 inch to view Logic, especially when you open the soft synths.
    well yes... or, in my case, the 15 inch screen was still not enough so I went for the 17. it has exactly the same res as the 20" cinema display which I was already used to with logic, so I'm happy. plus I never use this machine as my laptop to carry around (I kept my powerbook for that) so I didn't need to compromise on getting something that was still not too big to be a comfortable laptop. but I think if you do want to work with logic effectively and still have a laptop that's a practical size to use as a general laptop, the 15" is the right choice.
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    anyway, so far so good. like I said in my first post, logic is running like a demon. in general, this machine is running real fast for everything, like a fast desktop.
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    All,
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  • Now who has a brand new MacBook Pro Core 2 Duo?

    Hi,
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  • Macbook Pro Core Duo shuts off intermittently

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    Why reward points?(Quoted from Discussions Terms of Use.)
    The reward system helps to increase community participation. When a community member gives you (or another member) a reward for providing helpful advice or a solution to their question, your accumulated points will increase your status level within the community.
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  • My MacBook Pro Core Duo from 2006 shuts down randomly requiring frequent reboots to the point I had to abandon doing any project or anything on this MacBook Pro. Same thing occurs with the iMac dual core from 2007. MacBook battery replaced.

    My MacBook Pro Core Duo from 2006 shuts down randomly requiring frequent reboots to the point I had to abandon doing any project or anything on this MacBook Pro. Same thing occurs with the iMac dual core from 2007. MacBook battery replaced. Is it internal battery for both, new logic board required, bad hard drive, or bad RAM?
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