Sounds like a plane taking off!

Welcome to discussions, Bill.

No, an airplane noise is NOT normal. It could be your logicboard, and if you have had your repair for less than 90 days, you are still in warranty. Go back to the Apple store and have them listen to the fans, tell them that you are dissatisfied and find out if your machine is covered by the Repair Extension Program. If it is, the logicboard will be free.

Please post back,

Miriam

ahh maybe its getting to the temp of when the fans need to kick in stronger. but yes MGW is right about takeing it to the apple store and crabbing at em. haha just kiddin.

I had this problem last year and my iMac just quit. Prior to quitting the fan noise was extreme and it felt very hot in back on the left side (looking from the screen). I used an external fan and that cooled it down, but eventually it crashed.

I'd be afraid the hard disk would crash and would suggest you backup any important data.

Apple replaced the hard drive. Thank goodness I have the Protection Plan.

iMac G5 Mac OS X (10.4.7) 160 GB internal, 320 GB and 1TB external hard drives

Have AppleCare check on the hard disk, and re-sit it if possible, and if they can, put in another drive to see if the fans become more quiet whisper.

The reason I said so is because before my previous drive died, my iMac has soft hum hairdryer fan noise... bearable but audible. After a new drive has been replaced, the iMac is very very quiet.

Cheers

Sorry to hear about your woes.The only time you shoud really hear the fans is if: a) The ambient temperature is high and, b) The computer is being stressed (Photoshop, video editing etc.)

My advice: call Apple and explain the problem. But before you call, note down your serial number (it's on the bottom of the stand), memory, OS X version, and detail the problem. You could also run the extended hardware test from the installation disc. To do this, start your computer normally and insert OSX disc 1 (mine came with 2 DVDs) when you get to the desktop. Restart, and hold the 'option' button on the keyboard. When the computer is ready, select the hardware test (surprise!). Select the extended test... and wait... and wait. It takes about 1 hour and 45 minutes on my computer. By the way, it's normal for the fans to howl when the test is in progress, so don't worry about that. If there are any messages, note them too. Then call Apple.

Good luck!

iMac G5 ALS Mac OS X (10.4.7)

iMac G5 ALS Mac OS X (10.4.7)

iMac G5 ALS

iMac G5 ALS Mac OS X (10.4.7)

i dont have high fan noise when im in photoshop or iMovie. belive me i have tried to see what can make the fan run high. the only time i get the high fan is for some reason every time my iMac starts up it goes to the grey apple and the little circle spin goes and goes for about 20 seconds then the fans run high and it starts up normally. or when i hit the option key on start up or when i go into firewire disk mode.

Now, I was merely giving an example of the kind of situation that MIGHT cause the fans to spin up, temporarily. If you don't notice ANY variation in fan speeds when using Photoshop (for example), you must be working in freezing cold room or listening to your iPod.

If an iMac persistently sounds like a typhoon, well, that's something for the techies to look at.