Restore firmware to return to the configuration of apple fans

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Level 1

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Restore firmware to return to the configuration of apple fans

Hello:

When I'm in Windows under Boot camp the fan never exceeded the 2000rpm. In Mac, the fan was controlled by "fan control". I think that Fan Control has changed any configuration of firmware and my macbook pro can't handle the fan by itself when I unable Fan Control.

I've reset the SMC, and I tried to reset the PRAM, but when I press the shortcut keys, the macbook does nothing and boot normally. I don't know if I have errors in the procedure. I press cmd alt+pr and the boot button... Can it be that my computer does not have PRAM because it is recent, but I don't know...Afther reset SMC, the problem persist.

I thought: if I restore the firmware, everything back to normal. Buuuut there isn't cd of firmware restoration for macbook late 2008 - 2009...

Can anyone help me recover the speed of the fans proposed by apple?

Thanks, I hope that you understand me, I'm spanish and my english is very poor...

MacBook Pro 13'' 2,53Ghz 4GB RAM, Mac OS X (10.6.1)

Posted on Nov 4, 2009 7:35 AM

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Answer 1

joeuu

Level 5

5,089 points

Nov 4, 2009 8:01 AM in response to AlberBook

Your English is fine, not to worry.

I always thought you can't go backwards in the firmware department:

See: http://support.apple.com/kb/HT2213

The Firmware Restoration CD can restore the firmware of an Intel-based Macintosh computer. Note: Restoring your firmware will reset some of your computer's preferences to defaults. You can only use this to restore the firmware after an interrupted or unsuccessful update. If your computer is already in this state, you'll need to download the software and create the CD on another Macintosh computer, or you can take your computer to an Apple Store or Apple Authorized Service Provider to restore your firmware. This CD can be created on either a PowerPC- or Intel-based Mac, but only works with Intel-based Macs. Note: This CD cannot be used to return an Intel-based Macintosh computer's firmware to a previous version if a successful update has already been performed.

Joe

Message was edited by: joeuu

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Answer 2

AlberBook Author

Level 1

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Nov 4, 2009 8:53 AM in response to joeuu

Thanks Joeuu, but I don't want to return to a previous version, I want to return the default values.

I expose my problem in another way: the fans are always about 2000 rpm, how do I change their speed according to temperature?

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Answer 3

eww

Level 9

53,028 points

Nov 4, 2009 9:41 AM in response to AlberBook

Reset the System Management Controller and see whether that solves the problem:

http://support.apple.com/kb/HT1411

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Answer 4

AlberBook Author

Level 1

0 points

Nov 4, 2009 10:05 AM in response to eww

I do everything about the reset of SMC: Step 1, step 2, and step 3 (shutdown pressing boot buttom 10s), and later I press shift + alt + ctrl while I press boot buttom. The fan continue without increasing the speed.

Message was edited by: AlberBook

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Answer 5

Nov 4, 2009 8:25 PM in response to AlberBook

From what I can tell, Macbook Pro 13 is very reluctant to increase the fan speed, but it will do it if the CPU is driven at 100%, on both cores, for a sustained time. This might actually be what Apple intends for this CPU - it's a new Intel CPU model which has a very high specification for safe operating temperature.

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Answer 6

AlberBook Author

Level 1

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Nov 5, 2009 6:44 AM in response to AlberBook

Will Apple release an update for the efi?

tele_player, you can tell if your MBP13 has the same problem?

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Answer 7

Nov 5, 2009 7:12 AM in response to AlberBook

YOu said that you tried to reset the PRAM but that it fails to do so. I assume you mean you do not get the second startup chime.

If that is true then something is wrong that needs addressing regardless of anything else. Resetting the PRAM should work. Do you continue to hold down command-option-p-r after you press the power button? If you don't then that is your problem. You must hold down those 4 keys then press and release the power button and continue to hold the 4 keys until you have heard the startup chime at least 2 times. Then you can let go of the buttons and the machine will start up.

If this does not work then something is wrong with your computer. Also, Fan Control does not change the firmware.

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Answer 8

AlberBook Author

Level 1

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Nov 5, 2009 7:25 AM in response to Gregory Mcintire

I forgot to mention that finally I could restart the pram. Before, I couldn't because I had enabled the firmware password. After reset the pram, the problem persists. Sorry...

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Answer 9

Nov 5, 2009 9:30 AM in response to AlberBook

AlberBook wrote:
tele_player, you can tell if your MBP13 has the same problem?

I'm not sure there is a problem. On my MBP13, it needs to be at 100% CPU, with CPU temperature up near 100C, for several minutes, before the fan speeds up.

This may be what Apple intends on this CPU.

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