Currently Being ModeratedJan 30, 2013 5:37 AM (in response to macimacmac)
Can you boot from the Snow Leopard DVD? If so, have you run Disk Utility-->Repair Disk?
It's possible, I suppose, for Firewire to work on a bad logic board....the logic board controls a lot of other things in addition to Firewire.
You don't say how old your iMac is....is it a 2007 or older model? (I only ask because nothing lasts forever).
Currently Being ModeratedJan 30, 2013 6:33 PM (in response to Mike Osborn)
Thanks, yeah unfortunately I don't have the disks, only Tiger discs, and I believe I tried to boot from the Tiger Discs and it didn't work as expected. Its something to try again though when I get the computer back. So thanks heaps.
The iMac is 2007, and I know computers don't last forever, but Macs are awesome! And it functioned without a single glitch up to the day it (likely) died... No signs of a bad logic board such as freezing, fan running excessively, nothing. Makes it that much harder to accept.
Currently Being ModeratedJan 30, 2013 6:45 PM (in response to macimacmac)
When you get the computer back, I would also try resetting the SMC controller. It just might work in your case.
Here are the instructions:
Resetting the SMC for Mac Pro, Intel-based iMac, Intel-based Mac mini, or Intel-based Xserve
Shut down the computer.
Unplug the computer's power cord.
Wait fifteen seconds.
Attach the computer's power cord.
Wait five seconds, then press the power button to turn on the computer.
Currently Being ModeratedJan 31, 2013 12:25 AM (in response to Mike Osborn)
Ok thanks I never tried that. The ill computer will be back in 2 weeks so I'll update on the situation once I've tried these suggestions. So super appreciative for your help. Before I thought to post a question on here I'd all but given up on it. Will be amazing if something works and it comes back to us!
Currently Being ModeratedFeb 15, 2013 12:37 AM (in response to macimacmac)
Hi Mike - I am now writing from my 'Dead' computer! Thanks again so much. I tried all your suggestions and they didn't exactly work but the results gave me enough hope to keep researching other things I could try.
I would like all the Apple Community (especially in NZ) to know that I took my ill computer that wouldn't complete start-up to Mac specialists 'The Core' in Newmarket. They spent a few minutes with it, diagnosed a failed motherboard, quoted $2500 to fix it - and showed my Dad (aka my courier on the day) some nice shiny new iMacs.
I have now managed to fix the computer myself (a woman with hardly any computer knowledge), by making a carbon copy clone of a similar iMac (smaller screen, similar specs), and replacing this hard-drive with the bootable clone of the other iMac.
Obviously the motherboard was NOT the problem. I'll be phoning The Core next week to let them know what I think of their 'service'.
I encourage everyone with a sick computer to do their own research, ask lots of questions, and if you can't find a way to fix it yourself then take it to some place with an excellent reputation.
Currently Being ModeratedFeb 17, 2013 3:11 PM (in response to macimacmac)
Very sorry, the computer died again after a few days of happy usage. I guess The Core did know what they were talking about. Please disregard the above comments (I can't find a way to delete the post).