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Imac noise as a fan what can i do?

My iMac went off during the night. When I turn it on it has a noise as a fan.it is a fan it blows air on the top on its back

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  • 388 Answers

It may be a certain mode that the iMac is running in. Here's a link telling you one way of solving the problem:

iMac Fans run at full speed after computer turns on

It may have shut down due to overheating. Here is a link with some solutions:

http://www.macworld.co.uk/how-to/mac/how-fix-overheating-imac-imac-overheating-tips-advice-3462816/

Posted on Nov 29, 2014

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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Clearercape
  • 38 Answers

SOURCE: imac g4 cd drive

It;'s not a great Idea flipping the mac over they have a special stand to put them on when working on them. But it should be able to cope with it. Your mac is relatively old now. With all the moving around it could have just given up the ghost.

They are quite tricky to work on with the hard drive sitting on top and the cables running over and down the side there is a stack of heat generated there. Just make sure you put ll the thermal back in. If it's not a miss seated connection it could be a number of things. Cable, heads. Trouble shooting is quite tricky. As it is a desktop, in a lot of cases it is cheaper to buy an external DVD reader/writer. They are faster now!

You should be able to install OK when it is in terminal mode. You could run disk utility but more than likely you'll have to run the installation again.

Sorry, not much help.

Posted on Sep 12, 2008

MacApplePi
  • 86 Answers

SOURCE: Apple iMac 17 Model A1058 won't turn on

Re the light turning on for about 3 secs.
Does the computer make a 'start up' chime or any other tones?
If not, this could be for a variety or reasons.
Firstly you need to verify that the power supply is working. Remove all connections from the computer including the keyboard and mouse. Try to start up again. If the computer still fails to start up, you will need to gain access to the computers internals.
Lay the computer face down on a soft cloth to protect the screen. Undo the 3 silver screws on the lower edge of the computer. (one at each end and one central. These are captive screws.)
Lift the rear cover away from the main body of the computer.
On the Logic Board there are 4 diagnostic LEDs indicated by a yellow arrow on the board. To the left of these LEDs there is a small button. This allows you to power on the computer with the rear cover removed. Connect the power lead. LED1 should be 'ON'. If it is 'OFF' then you need to replace the power supply.
Turn the computer on by using the internal power button.(LEDs 2&3 should now be 'ON'. If LED2 only comes on momentarilty then replace the power supply).
Does the computer start up normally after pressing the internal power button?
- Yes: Press and hold the power button until the computer powers off.
• Unplug the power cord from the iMac, and reinstall the back cover.
• Return the computer to the upright position.
• Plug the computer back in, and press the power button to turn on the computer.
• Make sure the computer is starting up properly. If the computer will ONLY start up
from the internal power but will not power on from the power button on the back
cover, the power button on the back cover may be faulty.
- No: Reset the SMU.
• Unplug all cables from the computer, including the power cord.
• Wait 10 seconds.
• Plug in the power cord while simultaneously pressing and holding the power button
on the back of the computer.
• Let go of the power button.
• Press the power button once more to start up your iMac G5.
If the computer starts up normally then shut down and replace the rear cover.
If you feel uncomfortable about working on the computer, take it to a reputable repairer.
Hope this helps.

Posted on Jan 05, 2009

gserle1
  • 4 Answers

SOURCE: imac g4 lcd black screen replaced pram battery

If you can find an older SVGA monitor, try hooking it up to the port on the back of your mac. If you get video then chances are the LCD display is shot.

Posted on Sep 02, 2009

  • 1 Answer

SOURCE: how do I replace a dvd superdrive in a 24 inch imac

Hi, I have an iMac 20", its not 2 years old, and the dvd got stack inside, it won't come out, how in the world can I fix that problem? how can I change the dvd burner?.
Is there anyone who could help me hout?
thanks
Jose

Posted on Aug 01, 2010

shadowqat
  • 72 Answers

SOURCE: iMac G4 Mac Desktop: imac g4 wont boot up scree's just blue?...

If it only boots to a blue screen, try booting up in Safe Boot mode:

http://support.apple.com/kb/ht1455

If this does not work, boot from your install DVD and use Disk Utility to repair the disk:

http://support.apple.com/kb/ht2956

If this does not resolve the issue you may need to use your isntall disc to perform an Archive and Install:

http://support.apple.com/kb/ht1710

Posted on Aug 20, 2010

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