Model A1225 / Mid 2007 and Early 2008 / 2.4, 2.8, or 3.06 GHz Core 2 Duo processor

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Curious Boot problem iMac 24"

Hello all, would love to hear if anyone has any sound advice regarding this problem.

Had a PSU fail on my 24" iMac EMC 2134 and have had that repaired and also replaced the RAM that was fried. Still failed to boot despite chimes and successful Apple hardware test. Would not boot in safe, single user, recovery etc etc.

I am able to boot to Ubuntu on USB with the iMac, so graphics card and new RAM cant be to blame?

Removing the HDD from the iMac, that booted no problems when it was attached via USB to my MacBookPro.

So do I assume that there is a problem between the HDD and its connection to the motherboard? Replace cables? Or could it be another component that I wouldnt be able to replace?

Thanks in advance guys



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1 Answer

Chosen Solution

By chance is this a replacement HD, not what came from Apple with the system?

If so, review the SATA I/O info for your HD, it's likely a SATA III drive which is too fast for the systems I/O which is SATA II.

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Thanks for the tip, I'll check what speed SATA it is. I have a feeling that it is SATA II as its not top of the range. I have just installed Ubuntu onto the new drive and its working fine. OSX still refuses to do anything.


If the drive is SATA II then your boot sectors on the drive are likely messed up (will need to reformat and partition the drive - Ouch!). Or, you didn't set the which partition to startup with via the startup disk system prefs.


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