crwdns2933423:0crwdne2933423:0

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

crwdns2934591:0434crwdne2934591:0 crwdns2934593:0crwdne2934593:0

iMac startup stalling at 30%.

Hi my iMac is stalling during the startup process. Using any of the following methods the result was the same: progress bar gets to about 30% then stops progressing.

It has been left overnight in this state.

I have tried from built in HD, external usb HD and yosemite installer on thumb drive.

I have succesfully booted a macbook pro using the iMacs built in hard drive in target mode as the startup drive for the laptop.

So it does not appear to be a drive issue!

In verbose mode starting from recovery partition (on a cloned ext usb hd) it stops at:

Block Image

In verbose mode starting from tested clone of internal hd it stops at:

Block Image

Safe mode yields the same result.

In single user mode I can run fsck. No improvement.

Is this possibly a pram battery issue?

crwdns2934081:0crwdne2934081:0 crwdns2934083:0crwdne2934083:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2944067:02crwdne2944067:0

I should also note that I swapped back in my original ram just in case that was an issue but this made no difference.

I am trying to locate a copy of AHT for this machine to see if that will run of a thumb drive.

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

I am now going to look at a newer iMac and see what is supposed to happen after wifi loads in verbose mode.

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

crwdns2934285:0crwdne2934285:0

crwdns2933313:01crwdne2933313:0

crwdns2934051:0crwdne2934051:0

Try running AHT from the original system installation DVD.

crwdns2934105:0crwdne2934105:0

crwdns2889612:0crwdne2889612:0 0

crwdns2944067:02crwdne2944067:0:

Sadly I do not have those. Every install since and including Os 8 here but not the model specific ones for that particular machine.

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

Is there another way to run AHT on this machine apart from System install discs?

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

crwdns2934285:0crwdne2934285:0

crwdns2934229:0crwdne2934229:0

Dickon crwdns2934231:0crwdne2934231:0
crwdns2936625:0crwdne2936625:0:

crwdns2936751:024crwdne2936751:0 0

crwdns2936753:07crwdne2936753:0 0

crwdns2936753:030crwdne2936753:0 10

crwdns2942667:0crwdne2942667:0 126