Fans racing

I have a 6 month old MacBook. I have had a few experiences where, for example I am connected to a printer. When I disconnect if I forget to Quit from the printer but disconnect the USB cable for some reason the fans start to race. Normally when I am using the Mac they do not do this. On a few occasions I have found that by using the 'Force Quit' the problem stops. Today I have tried this and am still getting the problem. Does anyone know what causes this and how to fix it?

Hi ribbo39!
Here's what you did to fix your Mac: http://docs.info.apple.com/article.html?artnum=301733 - this will usually solve some issues like sleep/wake cycles, some video and yes, the FANS... (-:
Rick
iMac G5 iSight 20" - 30G iPOD & Hot Pink Nano 4G - WD 500G FW - Mac OS X (10.4.8) - HP Pav 15" WS and Toshiba Sat 17" WS LP's - Canon 20D & A620 Kodak P880

Similar Messages

Display won't work and fans racing G5 and Apple display

I have a G5 tower with an Apple display connected using a DVI to ADC adaptor.
I have just moved house and now the display doen't power up. The computer starts up and plays its start sound but no life from the screen. The light in the start button on the display lights up when pressed, but goes out when the button is released.
After a while, the fans in the tower unit start racing.
Help!

Hi, Fans racing is normal if no OS loads to handle them.
I'd open it & carefully reseat the Video card for a start.

Fans racing unable to stop them.

My Imac G5 has suddenly started to have the fans racing at full speed or so it seems.
They continue non-stop and I can find no way of stopping them. Have tried powering off and leaving for 15 mins restarting but they start off again at full speed.
Activity monitor does not reveal anything wrong -all seems normal.
Anyone have ideas of how to stop this problem?
Alan
Imac G5 Macbook Pro Mac OS X (10.4.9)

Hi ribbo39!
Here's what you did to fix your Mac: http://docs.info.apple.com/article.html?artnum=301733 - this will usually solve some issues like sleep/wake cycles, some video and yes, the FANS... (-:
Rick
iMac G5 iSight 20" - 30G iPOD & Hot Pink Nano 4G - WD 500G FW - Mac OS X (10.4.8) - HP Pav 15" WS and Toshiba Sat 17" WS LP's - Canon 20D & A620 Kodak P880

MBP fans racing, causing instant cut-off - see temp data...

My MacBook Pro has started performing a new trick. (And yes, this is after I updated to Leopard). Every so often it will go into a bout of the fan racing at full tilt and then - snap - power is cut. Nothing in the logs that I can see about this. Reboot and same will happen moments later. Then it stops doing it for a few days.
I started running Hardware Monitor to catch temp readings when it next happened and...it's just started again. I was able to grab screenshots of the temp readouts before losing power. Check this:
http://pix.blakespot.com/view/computers/screenshots/mbpheat_shutdowntemps.gif.html
Obviously the GPU & GPU sink sensors are sending out-of-range data (-128 deg C!) and the system goes into "save my skin" mode.
This is an out-of-warranty Core Duo-based MacBook Pro manufactured within the first 3 months on the market - an early unit.
Is this a known problem? Is there a solution? Could this be a Leopard thing?
Thanks.
blakespot

My guess would be that you've had a sensor failure which is causing your issues. However, it is possible that it's a Leopard issue so to be sure that it isn't install Tiger onto and external and see if the problems go away when booted in Tiger.

G5 start up issue- tower powers up, fans racing, monitor blank

Dear fellow Mac folks,
Help! Mac is having similar problems as described in other posts, with some slight differences. I'm pretty stranded without it and writing this post from my phone *****. Any help would be appreciated.
Basically, the tower powers up but doesn't start up. There is no start up tone and my monitor, which is correctly connected, shows nothing but a message to check connection cables. Within a 30 seconds of turning this beast on, the fans start racing at max speed and continue to do so until I hold the power button to turn it off.
I recently had a playstaytion connected to the same monitor, Mac connecting via VGA, ps3 connected via dvi. I would shut down th Mac and wait a minute, then power the ps3 and the game would come on the monitor. Since ditching the ps3 a few days ago and reconnecting the Mac to the
Monitor via the original connection (dvi) the above mentioned problem started. At first I could manually turn off the Mac, restart and get the welcome screen on the Mac and be ready to go. Now the thing just races the fans and never shows me an apple or desktop to work with. I googled about resetting the smu and did that, but there was no change in the situation. Have any ideas for this poor soul?

Mixtere wrote:
Dear fellow Mac folks,
There is no start up tone and my monitor, which is correctly connected, shows nothing but a message to check connection cables.
OK, no startup chime, we have to back up a bit, because the chime (or boot tone, in Apple parlance) is a critical point.
Question number one: is the white LED flashing during the start process?
No?
1. Replace memory
2. Replace logic board
Yes?
Count flashes. See this table
2 Flashes: No RAM is installed or detected.
3 Flashes: Incompatible RAM types are installed.
4 Flashes: No RAM banks passed memory testing.
5 Flashes: No good boot images are detected in the boot ROM (and/or there is a bad
sys config block).
6 Flashes: The processor is not usable.
Another thing ti try is to remove all peripheral connections, including the monitor, and see if the unit will power and quiet the fans.
Oh, and the final thought: how old is your PRAM battery? Hasn't been change in a few years? It should be replaced by a fresh one. A marginal or bad battery can cause bizarre stuff to come up on PRAM reads that just confuses the heck out of the firmware running at boot.

Fan racing intermittently, no CPU load, Thinkpad Yoga 15

I just purchased a Thinkpad Yoga 15. I was trying to fix its disabled discrete graphics card. One thing i did was update the BIOS. I think it's after this that the fan started to intermittently race. It's silence, then runs loudly and annoyingly for a second or two, slilent again, then randomly continues. Before the upgrade it was silent all the time.
This is terrible. Anyone has any ideas?

paraloid wrote:
Well here I am on the new thread as well - and like heck the issue was resolved on the old thread. As mentioned before by myself and others on the other thread, I would update the BIOS, the fan would work for a while, then it would stop again until I updated the BIOS yet again.HOWEVER, thinking on this, and a variety of other problems I've been having with the TP Yoga (a whole lot - such buggy software), I remembered from my T61 days that the Lenovo System Update software is pretty hit and miss with finding updates. So I went to the Lenovo downloads page for the TP Yoga and indeed found a lot of software not passed onto me by the System Update.Amongst these was (TA-DA !) a utility "Lenovo Fan Test for Windows". I thought it would be useful to install in any case to test if the fan was operating properly (it was not part of the standard suite of diagnostic tools provided on my computer).Anyway since I installed it my fan has worked !!! - but only when my computer is plugged in, though this I believe is because I am using Lenovo Power Optimized (Lenovo Power Manager was another software on the site not provided to me via System Update) which I believe relies on passive cooling (throttling back processor) when only battery power is available. But now TpFan works all the time, though only in smart mode, and when I plug in the power to stream a video the computer doesn't reach boiling point and then shut down.Interesting. My fan diagnostic comes up as unavailable...

Fan racing when playing .avi movie

This just started this summer. The fan on my MacBook Pro races faster and louder when I try to play an .avi movie in Quicktime 7.2. The CPU races up to around 70% as well.
It is also taking longer than normal (up to a couple of minutes) for Quicktime to open up when I double click directly on a movie file.
Does anyone know a solution to this problem? Thanks!

http://perian.org for your stubborn AVI files.

Fan racing and won't sleep - please help

I have a 2.16 Ghz Intel 24" iMac. Recently I began to have the following problem. Once I use it for awhile and it starts to get hot, the fan activates on high. As a result, the computer will never go to sleep. Even if I try to put it to sleep manually, the display darkens but it immediately wakes up again and won't go to sleep without a shut down. I read all of the postings on this and can't find anything similar. I also should mention I have nothing but an Apple wired keyboard and mouse connected, along with an Ethernet connection to a TimeCapsule. In settings, "wake on Ethernet" is off and there are no apps in the start-up chain. I also verified and repaired permissions. If anyone has any ideas I'd greatly appreciate them. Thanks.

Redo the SMC reset, in addition to unplugging the power cord from the back of the computer (not the wall!!!!!!) unplug all peripherals such as external HD's, keyboards, mice, printers etc... When you re-start the computer only plug in the keyboard and mouse.
If that still does not solve the problem do a PRAM reset by:
_PRAM RESET_
• Shut down the computer.
• Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
• Turn on the computer.
• Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
• Hold the keys down until the computer restarts and you hear the startup sound for the second time.
• Release the keys.
Repost what occurs after you done both the SMC and PRAM resets.
Regards,
Roger

Boot Problems (Fans Race)

I have a 20" 2007 2.0ghz C2D iMac that's refusing to boot, upon pressing the power button the fans race and nothing else happens. It will shut down if the power button is held for 5 seconds. If booted with no ram it doesn't beep, so it's not getting very far into the boot process.
So far I have confirmed (by testing in another iMac) that these components work:
hard drive - working iMac booted fine from this - s.m.a.r.t status was verified
ram - known to be working
CD drive - span up and read discs fine
LCD screen - worked fine
power supply - (just the circuit board - no cables) powered up the working iMac
This leads me to believe it's a problem with the logic board, however I tried the logic board from the working iMac (same age but 2.4Ghz) in the broken iMac, and even after a SMU reset it behaved in exactly the same way as before. That said, switching the suspect logic board into the working iMac didn't get much better results - the fans raced and it got stuck on a grey screen.
When booting the broken iMac (with it's own logic board) the first three lights come on the logic board light up, however the fourth doesn't - does this indicate something?
I don't really want to take this to be serviced as it'll cost more than it's worth spending, but does anyone have any ideas on what to try next?

Did it ever boot normally?
Until today, it had never boot abnormally.
Did you install any new software or memory just
before this started happening?
I installed some fonts last night... no new software immediately preceding this, however. Norton anti-virus, Microsoft Office, and a nightly WebKit build last week, but I've used it without problems since then.
Have you launched Disk Utility from your install disk
(located in the file menu) and Repaired Disk and
Repaired Permissions?
Not yet -- I was still in the denial / hopefull thinking phase of repair. Will do that and post back here either way. Thanks.

Strange Fan Spin-up Patterns

Lately every time I have awoken my MBP from sleep, the fans spin-up to over 6000 rpm and run for a few minutes. Obviously the processors are not hot, I double checked though.
The main difference lately is that I'm in Sudan now. There's no such thing as being indoors here. So my laptop sits in a building that is 'relatively' cool when compared to being outside in the sun. So I'm not sure if a sensor is getting heated up or what. But even then, it should not be exceeding 110, which is around the normal operating temp of the processors. Any ideas?

It sure sounds like the ambient temperatures are affecting the heat sensors but 40c for a computer is somewhat cool (hot for us though)
Did you try resetting the SMC to see if that corrected the problem. Also when you reboot do you hear the fans racing at start up?

High temperature and fan speed in ML

After upgrading to ML my MacBook Pro gets extremely hot, around 90 degrees, within a minute out of nowhere with the fans racing at 6200 rpm. This doesn't even help cooling it down one little bit. I already tried to shut down my laptop and reset the SMC which only solves the problem temporarily.
Does anyone else have this problem, and if so is there a solution at all or is it just a software issue that Apple is, hopefully, resolving soon?

If you can, open Activity Monitor and see what's using up all the %CPU.
If its kernel_task, shutdown immediately and do a PRAM reset, like this:
1. Power down the machine.
2. Locate the following keys on your keyboard in preparation for Step 4:
‘command’ – ‘option’ – ‘P’ – ‘R’
3. Press the ‘power on’ button.
4. Immediately – and before the grey screen appears – hold down ‘command-option-P-R’ all together.
5. Keep them held down until you’ve heard the start-up chime twice. After you release them you should hear it again, and hopefully your Mac will boot up as it should and with the kernel_task process back to normal.
If that's not it, try quitting whatever the process is by selecting it in the Activity monitor window, then 'Quit' in the task bar. If the process refuses to quit, post back with the name of the process.

Fans intermittently run @ full speed - problem solved - wireless card was culprit

I hope this helps someone in the future with this odd problem, that I see is rare but not unknown.
I have a P7-1222 which from new, would on about 1 in 10 powerups (i.e., random) have both CPU and case fans running full speed (several thousand RPM) making the machine very loud. They would reset to more normal speeds of ~ 1000 on a cold or hot reset.
TMPIN1 at time this occurred at powerup would, via HWMONITOR or SIW, show 99C (which was impossible), making the fans race.
Two motherboard replacements, PS substitution, CPU swap etc. did nothing. The intermittent problem persisted.
Now the culprit has been identified. I replaced the wireless LAN/Bluetooth combo PCI mini card with an identical unit from eBay (in this machine, an HP COMPAQ 615939-001 652279-001 WIRELESS N BLUETOOTH COMBO WLAN MINICARD). The problem of intermittent fan racing is now gone.
The wireless card in the machine seems to have been the culprit, perhaps occasionally sending a noise spike on powerup as it initialized onto the bus, thus affecting the Fintek F71858 LPCIO TMPIN1 reading and making it 99C, causing fans to race via BIOS thinking the machine was burning up!
Doing some investigating, I had found the following in the Data Sheet for the Fintek F71858 LPCIO chip ("Hardware KBC with ACPI, Temp. and Fan Control") used on numerous HP/Pegatron motherboards, including the Carmel/Carmel2 and other HP boards that use the same basic circuit layout:
=======================
8. PCB Layout Guide
F71858 adopts Current Mode measure method to do temperature detected. The measure data will not be affected by different process of CPU due to use current mode technology. This technology measures mini-voltage from the remote sensor so a good PCB layout must be cared about noise minimizing. The noises often come from circuit trace which is a track from remote sensor (CPU side) to detect circuit input (F71858 side). The signal on this track will be inducted mini-noises when it passes through a high electromagnetic area. Those effects will result in the mini-noises and show in the detected side. It will be reported a wrong data which you want to measure. Please pay attention and follow up the check list below in order to get an actual and real temperature inside the chip.
... Place the F71858 as close as practical to the remote sensor diode. In noisy environments, such as a computer main-board, the distance can be 4 to 8 inches. (typ). This length can be increased if the worst noise sources are avoided.
Noise sources generally include clock generators, CRTs, memory buses and PCI/ISA bus etc
=======================
And defective wireless cards can be a noise source too, it seems.

The issue was what I expected. I picked a new reader last night and everything works fine. My old card reader just didn't work with the new card.

A disk in the DVD drive causes a crash, machine will not start

I have a fairly bizarre problem, searched, didn't find it in here so... maybe I am special. Anyway. I have a 2.4ghz MBP with 4GB of memory. I got it in November (with Leopard). It has worked without an issue until I started tonight to give bootcamp a go on it.
Symptoms:
- Leopard boots up fine, logged in, nothing else open
- Insert any disk (DVD, CD-R)
- Leopard crashes
- continues to cycle through a restart but it keeps crashing waits 1 min, restarts, repeat
- Even tried a Leopard disk
Tried:
- disk utility to look at things
- can't load anything to check the hardware cause its cd based
What I did before it started going nuts?
I used bootcamp to partition the drive. This worked fine. Stuck the XP disk in and it read it fine. Machine rebooted to install XP, this was fine. Things went well until the XP install asked for a reboot. Then it restarts, disk failure. I eject disk and select OS X. Off we go, things are good.
I delete partition thinking something got screwed up. Tried again. This time when I put the XP disk in the thing crashes while in Leopard.
While I have typed this my machine has restarted a dozen times on its own. It is kinda funny to watch but *** has happened to it? I can't even re-install Leopard... no drive.
The DVD drive does spin up but after a few seconds it crashes. Any ideas out there?

Maybe related...
Bought a 2.6G MBP yesterday, brought it home, booted up, everything great until I started loading my apps---CDs/DVDs would spin and spin, then eject---then Install Disc 1 froze the system. Can't eject the disc---onboard fans racing like jet engines and the keyboard area near the screen seemed very hot. Posted last night---someone thinks either bad optical drive or motherboard. About to go see a Genius now. For $3K+, this pretty much *****.

Mac Mini, no video after 10.5.7 upgrade

I installed the 10.5.7 upgrade after reboot, had no video. I reset the smc and pmu then I got no power light and the fans raced. Reset pmu again and mini booted to grey screen with spinning indicator, then after a min or two the mac would just shut down.
put in original restore disc, my leopard disc will not see the hard drive. rebooted with the option key and selected the tiger install disc. Tiger installed with out a problem, then reloaded Leopard from original install disc I purchased, everything looked fine. Did software update to 10.5.7 and now I am right back where I started. It sure looks like there are issues with the 10.5.7 upgrade.

There have been some general, and no I do not know exactly how many have reported individually, reports about video issues as well as other problems following the update.
My Mac Pro, just had upgraded the video card to a neat Radeon 3870 early afternoon (yes, driver was installed before card installed per ATI/AMD - which I find stupid since what happens when an install DVD is booted!!!), then later updated the OS with 10.5.7. All I can say is nuts.
It is not a total failure, the computer appears to work with normal stuff - Mail, AOL, Safari beta 4 (updated) and other programs just simply run briefly to see if there are any immediate issues.
However, WoW blows up randomly after anywhere from 1 minute to 20 minutes of use.
Also, I noted noticeable heat from the front of the computer.
I have run Tech Tool Pro (v5.x) for various testing, including today a bad block scan (came up negative).
To describe how WoW blows up - complete screen distortion patterns, varied, as well as simply freezing the computer. Mouse is live, sometimes not visible, beach balling (what prompted the bad block scan) and arrow. Nothing else is responsive at all, cannot click to Finder, cannot keyboard force quit. The ONLY recourse is to hold the power button for the 6 seconds.
Sometimes on restart the computer grey screens, nothing on it. Force power down and restart will bring it back up, but a somewhat longer than normal boot process when it gets to the blue screen prior to the desktop.
Nothing in the Console log, all messages, helps. There is no indication of a panic or crash report.
Yes, I also did the other normal things - zapped PRAM, reset SMU - when the computer is acting up like this.

How to keep mac at its best condition

My mac have been overheating quite easily and battery is running out quicker than before so im wondering if anyone can tell me how to keep my mac at its best condition. My mac is 2010 mid mac book pro

Overheating, is it the 13" model?
Is the fans racing even when your not doing much of anything?
Do a SMC Reset if it's that
Step by Step to fix your Mac
I can't do anymore without some more detailed information, your Mac's model, the size etc.
If you installed 10.7 that would explain a lot, what's your RAM?
What programs did you install? Anti-virus? MacKeeper?

Fans racing

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