Suddenly my Firewire seems to not be working on my iMac G5. I have my external HDD and iPod using each of the ports. Neither one mount on the desktop and iTunes does not see the iPod. The iPod however still gets a charge when connected. I already ran a hardware test (all passed), unplugged the Mac for a minute, tried another user account, and still nothing. Profiler shows that FW is available but nothing is connected. Any suggestions?