Fans blow hard upon starting up

Dual processor 1.8 mhz. Fans blow hard upon starting up. It was freezing upon start up as well. Then I replaced the 1/2 C battery. The fans still blow hard but it doesn't freeze up on start up. Do I need to replace the other battery by the hard drive?

Panama Red wrote:
I hadn't run Disk Utility since I figured it was a battery problem.
So I did run DU and encountered problems. "Disk Utility stopped repairing since following error encountered: The underlying task reported failure on exit."
Hmmm....
Time to get a bigger hammer: DiskWarrior is one such tool: http://www.alsoft.com
Over the years, I have encountered that response from Disk Utility and DW has come through. Worth a try, anyway.
Message was edited by: old comm guy

Similar Messages

Fan blowing hard upon set to sleep

I have a few problems at the moment with my Imac G5. It starts up extremely slow..like 10 minutes and then it makes the fan blow when I put it to sleep and the light/heart does not light up anymore. The only thing I can do is to keep the powerbutton in and kill it. Does anyone know this issue?

Welcome to Discussions - you can try starting from your install disc and then use
Disk Utility
1. Insert the Mac OS X Install disc that came with your computer, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu. (In Mac OS X 10.4 or later, you must select your language first.)
Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.
3. Click the First Aid tab.
4. Click the disclosure triangle to the left of the hard drive icon to display the names of your hard disk volumes and partitions.
5. Select your Mac OS X volume.
6. Click Repair. Disk Utility checks and repairs the disk.
See what comes up and please post back with results.

Dead mini? Fan blows hard when plugged in-- that's it

Has anyone experienced this before?
My Mac Mini core duo has decided to do one thing these days-- as soon as you plug in the power brick cable into the mac, the fan blows like mad. Nothing else happens.
I've tried swapping out the RAM, but that ain't fixed it. I'd have problems trying a spare processor though.
Any tips? Is it economical to take it to the apple store, or is it eBay time for a secondhand one?

Many thanks for the tip.
Unfortunately, this little Mac's DVD drive is busted too!
I've just tried swapping the processor for another core duo (an identical part!) and that failed. I suspect it's the logic board.
Certainly, I have had the mac opened up, but it failed almost 3 months after it last opened -- and I am fairly proficient.
I feel this mac is now a paperweight. : (

My Mac Pro won't start up, fans blowing hard.

Hi,
I bought a secondhand Mac Pro 1,1 - dual core 2,66 Ghz a few months ago.
The company I bought it from put an ATI Radeon 5770 HD and a 150 GB SSD in it.
It ran completely fine untill yesterday afternoon.
I needed some extra storage space for my files, so I opened up my broken iMac G4, unattached the hard drive.
This is what happened:
I shut down my Mac Pro,
with all the cables attached I moved the Mac over,
I opened it up, put in the extra hard drive in bay 3 (power chord still attached), closed it and tried to power it on.
The graphics card's fan began to blow immediately.
I heard no startup chime. Ten seconds later the main fan began to blow.
There was no video output, the screen stayed on stand-by.
The Diagnostic leds show only 'trickled', no other leds.
I searched alot on the internet for a solution, and tried all the resets and solutions I could find.
A brief list of what I've tried:
-pram reset
-smc reset (manually and automatically)
-boot without graphics card
-boot without RAM
-boot without cd-drives
-boot without harddisks
-I pulled all elements out (graphics card, ram, power supply, HD's, cd-drives) to check for broken or loose connectors.
Nothing worked so far.
What I did find, are some damaged power cords from my cd-drives:
http://www.flickr.com/photos/75710783@N02/8389915636/sizes/o/in/photostream/
Could this be the thing that started this problem?
And if not, what could possibly be wrong?

The existing breaks in the power leads for the Optical drives should not cause this problem when the optical drives are disconnected, provided they are not shorted to something else.
But if, at some time, they shorted out, it could have confused or damaged the power supply.
First, reset everything:
Remove AC power.
Press and hold the power-on button for a quarter minute (this drains the capacitors).
Wait a quarter minute more.
Restore the AC power cord.
Wait a quarter minute more.
Attempt to start up again.
To check for damage, measure the DC Voltages at a Molex connector (such as the one that is not damaged). You should find a bit above 5 Volts on one of the outside leads (often red wire) and a bit above 12 Volts on the other outer lead (often yellow wire). This should be relative to either/both inner wires (often black wire) or any other black wire, or the frame.
( If you do not already have one, a perfectly serviceable digital multi-meter for this purpose can now be had for as little as US$10, and does not require a degree in rocket science to measure DC Voltages. More money buys a higher-quality instrument with additional precision that is simply not necessary, but not an impediment)

Fan Runs Automatically on Start Up

My fan runs automatically upon start up and does not go off. I've tried resetting the SMC and it did not work. Help!

jtl11968 wrote:
I just brought home a new iMac after my eMac's monitor died. Being used to the sound of the fan on the e, I'm not used to not hearing anything with this new i. I took the other poster's advice and downloaded the istat widget which shows the fan running at same speed as the hard drive - approx 1199 rpm. Ambient temp is 24 & HD temp is 44 after being in use for about an hour now.
But I still dont hear anything. I just want some reassurance that silence is normal.
That's normal.

Fan Error: Hard Drive-related?

A few months ago, my computer was running super slow. I ran the AHT and it showed I needed a new left fan.
When I took it into Apple, they diagnosed that, in addition to the fan, my hard drive was failing and needed to be replaced.
I took it to an Apple provider, told them the problem, and then they replaced the fan and not the hard drive. They said that with the new fan, the hard drive started working fine.
I am now having the fan error again, on the right side. I'm wondering if this is just a coincidence, or if it's related to the other issue. Is it possible that the hard drive failing could cause the fans to fail?
Thanks!

The left fan failing is probably why the right fan failed, as the right fan probably had to work harder to compensate for the failing left fan, and thus it was overworked and became compromised as well. It's usually prudent to replace both fans if one fails.
If your hard drive was failing back then, it's likely still failing. Possible the improved cooling helped it to work a bit longer. Here's a utility you can run to check out the drive's physical condition:
http://www.apple.com/downloads/macosx/systemdiskutilities/smartutility.html
You can download the demo and run it several times for free. If the drive really is failing, or is 3-5 years old, you may as well get it replaced when you get the right fan replaced.
Good luck!

PowerMac G5 freezes, fan is blowing hard

Hello everyone:
My PowerMac G5 is about 3 years old, running OS Tiger 10.4.11 and has been working fine. A couple of weeks ago, it started freezing up overnight with the fan going into overdrive and blowing hard. I can only shut it off by pulling the plug. At restart it makes 2 clicking noises, and then it boots fine--and works fine until the next freeze.
It started happening more often which prompted me to run the disk utility. It came up with a message that "Volume header needs minor repair." I repaired it using the OSX CD.
Question: does anyone else have the same problem and did the utility fix the problem for good? Or should I be thinking about a new hard drive? Thanks in advance for your help!!!

I can say I have the same problem with different results. I too have been noticing this is primarily happening when I out the machine to sleep. I will wake up in the morning to find the fans going full blast. I have also encountered getting a phone call from someone at home telling me my computer sounds like it's about to blow up! I put it to sleep each morning after checking my emails and heading out to work. At times the room can get get a bit warm and this may be adding to the issue. I have also read not to use any animated screen savers (which I have been) and so I may just do away with those to see what happens.
I have recently encountered more system freezes where I will have audio playing, the machine locks up with the audio sounding like a broken record repeating itself. The only way to get out of it is a hard reboot by holding the power button in. Same way I have to reboot it after I find it in the morning with the fans at full speed. I have also encountered a few kernel panics as well while in the middle of working in Photoshop or web browsing using Safari or just checking emails.
I have run the Apple Hardware Test CD both Quick and Extended Tests and get a pretty balanced result of everything is OK, or a Logic Board failure where it gives me this error code - 2STH/1/2:CPU B AD7417 AD1 - from which all I have been able to gather is something to do with a thermal sensor for one for the CPUs?
My CPU die temps are not horribly hot although I notice CPU B usually runs about 7-10º F warmer than CPU A. This is pretty constant as well no matter what task.
I have reseated all the boards, used compressed air to clean it out, cleaned the fans and radiator the best I can. I had one of the CPUs replaced less than 3 months after having bought the machine from Apple. I sure hope one of the CPUs is not going bad again as my AppleCare just expired 2 months ago.
I'd really love to know specifically what the error code I get from the AHT means. So far, I have been blessed not to see any leaks inside the case which seems to becoming a more frequent issue with my model machine.
I too am very interested to hear from others who are experiencing this issue. My S.M.A.R.T. status is good so I know my HD is fine. I have swapped out graphics cards and memory to the originals, neither of which have changed anything. Going to try reseting the SMU on the board again along. Also replacing the SRAM battery even though I know it has nothing to do with this specific issue. I just notice after forcing the machine to shut down and reboot, the date likes to come up as 1969 a lot of times.

HT3607 what wrong when you can start to hear the fan blowing?

I need to know what's wrong with my imac. When it power on you now can hear the fan blowing loud.
what could be wrong and can I fix it?

try this
http://support.apple.com/kb/HT3964

MacBook fan blows really loud for 5-20 sec.

hi guys, I hope you can help me with my little problem. I started my MacBook a few days ago and I notice that my fan blows really hard at non working procceces. he blows 5-20 sec. very loud as if he must work very hard. I will open my Mail and it's sound like my mom turning the hoover on. I have a CPU utilization of 5%.. do you have any idea? it is not syslogd, I checked it.
*I changed the backcover from my mac. it was a Apple exchange reaction.

hi guys, I hope you can help me with my little problem. I started my MacBook a few days ago and I notice that my fan blows really hard at non working procceces. he blows 5-20 sec. very loud as if he must work very hard. I will open my Mail and it's sound like my mom turning the hoover on. I have a CPU utilization of 5%.. do you have any idea? it is not syslogd, I checked it.
*I changed the backcover from my mac. it was a Apple exchange reaction.

Got a iMac upon start up it has white screen with apple logo and loading wheel spinning forever under it, does anybody know how to fix this?

PLEASE HELP!!!!!! EMERGENCY Upon start up normal start up noise occurs, then after white screen with Grey Apple logo, and a spinning loading wheel under it (thee repetitive lines NOT rainbow one) ?!? then thats as far as it goes it stays on that screen forever will not boot up. Any info on how to possibly fix? I've tried several of the Start up shortcuts , it wont even start up in Safe Mode . My fiance' is crushed she is a writer and EVERYTHING SHE HAS WORKED ON is somewhere on that hard drive. Any thoughts, i'm open to any and all LOGICAL responses, thank you very much for ya'lls time ........Its just heartbreaking to see my iMac in this vegistated coma,The whole reason i bought a mac was cause I love them I have Apple EVERYTHING, so once again please help.

Try this: Switch off your iMac wait 10-15 seconds hold down the Option Key (alt) key then press the power botton but keep the option key down. This should show all the available options to boot from. I trust you have a full backup, Good luck.

White lines of code on black background upon starting up

I recently sent my Macbook in due to problems with the screen going dark for no reason. Upon recieving the laptop back, I noticed problems upon starting. When I restart my laptop, there are white lines of code on a black background. I called in to support, but my support expired and here I am searching for help. They told me that I needed to try and reset my drivers, or my HDD is bad. To reset my drivers they gave me a combination of keys to press upon restarting, but I don't remember the combination of keys. I have repaired my disk using the install CD, but still am having problems.
It's crazy that I send my laptop in and get it back with other problems... Any help is appreciated becuase Apple surely isn't helping.
Macbook Mac OS X (10.4.8) Core Duo w/ Bootcamp

Turn the computer off. Wait one minute. Restart. If you are still booting into single-user mode (black screen with white print) then at the prompt enter:
reboot
Then press return. If this does not start you up into OS X then there's a system problem. You will need to reinstall OS X. You can do this using the Archive and Install option that does not require you to erase the hard drive. Your old system will be archived in a Previous System Folder at the root of the hard drive.
Before performing the Archive and Install you should do the following:
Repairing the Hard Drive and Permissions
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. Then select Disk Utility from the Installer menu (Utilities menu for Tiger.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported then quit DU and return to the installer. Now proceed with the OS X installation.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger) and/or TechTool Pro (4.5.2 for Tiger) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
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PC won't boot: fans stop spinning at start up!

Hi all
I have a Compaq CQ5335fr that worked just fine for a few years (3).
Then one day, it went off suddenly and wouldn't boot any more:
When I power it up, fans (CPU and chassis) start spinning for 15 seconds then they stop spinning. Only GPU fan keeps spinning. I have still blue and amber lights in the front of the desktop.
I usually push the power up button until it powers off. Then when I restart, same thing!
I tried the following with NO SUCCESS:
- clean & dust parts
- Reset CMOS
- Bought another PSU
- Played with DIMMS (put one by one, inverted etc.)
- Unplugged all components and replug one by one
- And a couple of other desperate things
- Put the hard drive in another computer to check if data are there: OK (although had "cant' access" errors in the beginning
Nothing worked.
NOW I NEED YOUR HELP TO LOCATE THE ISSUE IN ORDER TO SOLVE IT!
Thank you in advance.
This question was solved.
View Solution.

Hello again Moyiize.
I can't safely say if other motherboards would work or not. However, you should be able to get the same motherboard through HP. Here is a link to your computer's HP Part Surfer page. You should be able to order it there.
If you want to say thanks make sure to click the white star under my name to give me Kudos. I really appreciate it!
I hope you have a great evening.
Please click the white star under my name to give me Kudos as a way to say "Thanks!"
Click the "Accept as Solution" button if I resolve your issue.

Upon start up the mac stops at the gray screen

Upon start up the mac stops at the gray screen

Take each of these steps that you haven't already tried. Stop when the problem is resolved.
Step 1
The first step in dealing with a boot failure is to secure your data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since your last backup, you can skip this step.
There are several ways to back up a Mac that is unable to boot. You need an external hard drive to hold the backup data.
a. Boot into the Recovery partition, or from a local Time Machine backup volume (option key at startup.) When the OS X Utilities screen appears, launch Disk Utility and follow the instructions in this support article, under “Instructions for backing up to an external hard disk via Disk Utility.”
b. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, boot the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
c. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
Step 2
Sometimes a boot failure can be resolved by resetting the NVRAM.
Step 3
Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to boot, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can boot now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
If you've booted from an external storage device, make sure that your internal boot volume is selected in the Startup Disk pane of System Preferences.
Step 4
Boot in safe mode. Note: If FileVault is enabled on some models, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Post for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
When you boot in safe mode, it's normal to see a dark gray progress bar on a light gray background. If the progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, your boot volume is corrupt and the drive is probably malfunctioning. In that case, go to Step 5.
If you can boot and log in now, empty the Trash, and then open the Finder Info window on your boot volume ("Macintosh HD," unless you gave it a different name.) Check that you have at least 9 GB of available space, as shown in the window. If you don't, copy as many files as necessary to another volume (not another folder on the same volume) and delete the originals. Deletion isn't complete until you empty the Trash again. Do this until the available space is more than 9 GB. Then reboot as usual (i.e., not in safe mode.)
If the boot process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.
Step 5
Launch Disk Utility in Recovery mode (see Step 1.) Select your startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.
This is one of the rare situations in which you should also run Repair Permissions, ignoring the false warnings it may produce. Look for the line "Permissions repair complete" at the end of the output. Then reboot as usual.
Step 6
Reinstall the OS. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
Step 7
Repeat Step 6, but this time erase the boot volume in Disk Utility before installing. The system should automatically reboot into the Setup Assistant. Follow the prompts to transfer your data from a Time Machine or other backup.
Step 8
This step applies only to older Macs (not current models) that have a logic-board ("PRAM") battery. Both desktop and portable Macs used to have such a battery. The logic-board battery is separate from the main battery of a portable. A dead logic-board battery can cause a boot failure. Typically the boot failure will be preceded by loss of the startup disk and system clock settings. See the user manual for replacement instructions. You may have to take the machine to a service provider to have the battery replaced.
Step 9
If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store to have the machine tested. If you can't get to an Apple Store, go to another authorized service provider.

Mac Pro, Lion: front light flashing, fans blowing, and doesn't startup...

This has never happened before: my Mac Pro's (Lion) front light flashing, fans blowing, and doesn't startup...
Any workaround? Help, please...

If there is no response to keyboard or powerbutton presses; hold power button until it shuts off. Unplug and wait 5 minutes and then plug back in and try to start again.
Post back with results.

My new macbook air 10.7.3 is running hot with the fan blowing just by using the internet. Is there something wrong with the computer?

My new macbook air is 10.7.3 s running hot, with the fan blowing after about one hour on the internet. It will also run very hot with the fan blowing when it is closed and in sleep mode, is this normal? My macbook pro did not do this.

May 19, 2012
My Macbook Pro 15" Early 2008 model had been running hot for a long time.
Checked Activity Monitor. (Applications/Utilities)
AdobeResourceSynchronizer was taking 83% of CPU usage.
Did a google search and found information regarding AdobeResourceSynchronizer causing high CPU usage and heat.
http://forums.adobe.com/thread/822790
Problem seems to be Adobe Resource Synchronizer.app
To disable go to: System Preferences > Accounts
Click the Padlock icon, enter password if needed, click Login Items,
uncheck AdobeResourceSynchronizer
I don't know how this got install on this computer.
I suspect Adobe Reader. AdobeResourceSynchronizer.app is within the Adobe Reader application package.
Control Click (or right click) the Adobe Reader app, click Show Package Contents
Location: Applications/Adobe Reader.app/Contents/Support/AdobeResourceSynchronizer.app
Some other Adobe applications may also cause this to run.
After disabling this in System Preferences > Accounts, temperature seems to be acceptable.
Also start Adobe Reader X, go to Preferences, Tracker and in the "Automatically Check for New Comments and Form Data", slide the top slider all the way to the right so is says Never.
After having done all this and restarted the computer, check Activity Monitor again and see if
AdobeResourceSynchronizer is still running. If it is you can click on it so it is highlighted and click the Quit button in the upper left.
This solved my excess heat problem.

Fans blow hard upon starting up

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