Intel iMac (late '06) loud fans!

M

MattMatt

Registered
Hey guys, bought a sexy new iMac 20" 3 weeks ago from Apple, for the first few weeks it was fine, but now when i turn it on the fans kick in straight away. The fans dont kick in on full power, like when you turn it on and hold the power button, but they are still loud. I tried reseting the SMC (or SMU :S), the way Apple told me, but that didn't do anything!!


So please, any suggestions please post, its annoying and i don't wish it injury my mac!
 
Just to make sure that you and Apple are on the same page:
To reset the SMC :
1. From the Apple menu, choose Shut Down (or if the computer is not responding, hold the power button until it turns off).
2. Unplug all cables from the computer, including the power cord.
3. Wait at least 15 seconds.
4. Plug the power cord back in, making sure the power button is not being pressed at the time.
5. Reconnect your keyboard and mouse to the computer.
6. Press the power button on the back to start up your computer AFTER the
power cord has been fully inserted. Inserting the power cord while pressing the power button will cause the fans to run at full speed.

Step 2 is probably most important.

If the fans continue to run at a high speed after this simple trick, call AppleCare, or take to an Apple Authorized service.
 
I had a problem like that with a G5, turned out to be a loose sensor cable. They can diagnose whatever it is at any Apple Store, or you can send it in with AppleCare..
 
DeltaMac said:
Just to make sure that you and Apple are on the same page:
To reset the SMC :
1. From the Apple menu, choose Shut Down (or if the computer is not responding, hold the power button until it turns off).
2. Unplug all cables from the computer, including the power cord.
3. Wait at least 15 seconds.
4. Plug the power cord back in, making sure the power button is not being pressed at the time.
5. Reconnect your keyboard and mouse to the computer.
6. Press the power button on the back to start up your computer AFTER the
power cord has been fully inserted. Inserting the power cord while pressing the power button will cause the fans to run at full speed.

Step 2 is probably most important.

If the fans continue to run at a high speed after this simple trick, call AppleCare, or take to an Apple Authorized service.
Click to expand...

Yeah dude i tried that and they still comming on, im getting a reading of 127 Degrees centigrade on my Graphics Processor Diode, is that normal?!
 
DeltaMac said:
... If the fans continue to run at a high speed after this simple trick, call AppleCare, or take to an Apple Authorized service.
Click to expand...

Have you tried booting to your Apple Hardware Test? It's listed on the label of one of the restore DVDs that came with your iMac, with simple instructions for booting to that test, also on the label.
I don't know what is a normal temperature for the various sensors in your iMac, but if the fans run because of high temperatures, that's normal, it's what the fans are supposed to do (cool your system). If the fans run at high speed 100% of the time, that's not normal, and you can get that fixed under warranty.
 
DeltaMac said:
Have you tried booting to your Apple Hardware Test? It's listed on the label of one of the restore DVDs that came with your iMac, with simple instructions for booting to that test, also on the label.
I don't know what is a normal temperature for the various sensors in your iMac, but if the fans run because of high temperatures, that's normal, it's what the fans are supposed to do (cool your system). If the fans run at high speed 100% of the time, that's not normal, and you can get that fixed under warranty.
Click to expand...

Cheers man, ill give that a try.. and yeah i understand they are supposed to cool everything down but they are on 100% of the time, ive got in contact with my local Apple Store and they've suggested i bring it in, annoying as i'm in the middle of a lot of work in university but hey, i value my iMac more!
 
Right i ran a Hardware Test and got this error code:

4sNs/1/40000000 :TmOP

Im guessing somethings wrong, i called apple and they weren't helpful and said just take it to your nearest apple store, which i will do!
 
MattMatt said:
4sNs/1/40000000 :TmOP
Click to expand...

If your last code item is TH0P, and not the Tm0P that you listed, then the problem may be a hard drive temp sensor that has come disconnected.
If, in fact, you see the Tm0P code as the last item, then the sensor circuit is not testing properly, and will likely require a logic board replacement.

Either way, this requires disassembly of your iMac, and Apple would not provide any assistance other than "just take it to your nearest apple store", as there's nothing you or Apple can do to fix that over the phone.

Hey, good luck, your iMac will be back in good health soon! :)
 
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