IMac late 2006 doesn't boot

I just got a late 2006 iMac, 2.16Gh Intel Core Duo. The computer will not boot. The Apple and the spinning gear appear as thgough it will start up but the iMac shuts itself off. I used universal copys of Leopard and Snow Leopard and the computer just ejects them. How can I open the iMac to physically reset the SMU on the MLB or change the Hard Drive if necessary?
I have reset the PRAM and reset the SMU by umplugging and holding the power buttom as I plugged it in.
I do not know what operating system is on he iMac but I think it is Leopard.
What is my next step to get this iMac to boot?

playshop wrote:
I purchased from apple a copy of leopard. I purchased from apple a copy of Snow Leopard. These disks are NOT computer specific. They will work on ANY macs.
While your statement isn't correct they will not work on ANY Mac they should work fine on one of your vintage. What I mean is an license of OS X that is earlier than the original installed on the computer when it shipped from Apple will not work. For example if you bought a Mac with Snow Leopard on it you cannot install Leopard on it. However your machine originally shipped with Tiger therefore if the discs you have are upgrade DVDs of Leopard and Snow Leopard assuming your computer meets or exceeds those OS's requirements they should work fine. IN addition if the media you have is the media that shipped with other Mac's they will not work on your machine because that media is machine specific.
I'm not sure what you have (a photo of the media would be very helpful) however it's possible you have a hardware problem. What I'd recommend at this point is running Apple Hardware Test in exteneded mode. If no errors occur then run AHT in Extended Mode 2-3x, this will take awhile, probably 2-3 hours. If you still don't get any errors then your next stop is an AASP or Apple Store for professional diagnostics.

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http://reviews.cnet.com/8301-13727_7-10333969-263.html
and
http://www.thexlab.com/faqs/firewiretroubleshooting.html
SMC RESET
Shut down the computer.
Unplug the computer's power cord and all peripherals.
Press and hold the power button for 5 seconds.
Release the power button.
Attach the computers power cable.
Press the power button to turn on the computer.
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.
Roger

IMac Late 2006 Will Not Boot Up

I have a late 2006 iMac. The problem I have is that it will not boot up. I press the power button and the light comes on but the display is blank. Do you all think the problem is the logic board?
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My iBook has been having Logic Board issues similar to what you say though, but it's because of a chip on the lower side of the board that become desoldered. I ended up putting a small piece of rubber onto it to apply pressure onto the chip once I reapplied the case/undercover. It works & I backed up everything, but it sometime acts up again with similar symptoms as your iMac.

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I got white screen whenever I boot the computer.
I have tried all of the followings.
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Hi,
I had the same problem.
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Hi Everyone,
I have a 24 inch Intel iMac (late 2006) that has just died.
Running Command-V on boot up I get the following output in the console:
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boot file path: \System\Library\CoreServices\boot.efi
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Message was edited by: matzuber
Message was edited by: matzuber

smarkt,
Welcome to Apple Discussions.
It appears your internal HD has failed or is on it's last legs so it's time to replace it. If you have any Apple Care left you can get it covered under warranty however if you don't then I'd recommend you take it in to be replaced. You can use this link for locating an Apple Authorized Service Provider. The good news you have a backup of your important files.
As far as the remaining information you want to save that will depend on the condition of the existing internal HD. You may have to resort to a data recovery service (worst case) or if it's still got a little life in it you can put it in an enclosure and once the new HD is in your iMac move information to the new HD or your external HD.
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IMac late 2006 doesn't boot

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