This sometimes works for Cubes (worked once for me!). Maybe it will work in a desktop, too: Please read it in here: < http://www.macfixit.com/article.php?story=20040310010541585 > "Reviving Cube FireWire ports" "Then I found an obscure post on cubeowner.com which reported a 'programmer's reset' solved the problem for the poster. I tried it, and voila! I have firewire again. To invoke [the programmer's reset]: Shut down computer, hold down programmer's button, and press the power button to start up. If the power light flickers you've done it correctly." LM At 9:30 AM +1200 4/8/05, transform wrote: >i have os 10.3.8 installed and now my firewire output is not working and i think it is the operating system being corrupt. >i have the original panther cd and everything else is from up date which also isn't working at the moment....