Hi, I had the FW port on my iMac "go bad" and I had to take it in for a motherboard replacement, and thanks to having AppleCare I survived this! So I hope that's not your problem, but it was in my case. So long for now, TOM >I have two LaCie 250gb external firewire hard drives. >Both spin up when power is applied but neither show up on the Desktop >of my iMac G5. I have tried with two different firewire cables. >Referring to the Internet, it seems that many people have the same >trouble with external hard drives. This doesn't add up to me. What is >so difficult? Should be a simple plug and play situation. >Meanwhile, as neither drive is recognised, I am unable to apply any >testing or updating to them. Seems like a lost cause. > > >iMac 20" G5, 2gb RAM, 250gb HDD.