Checking for FireWire port trouble

Hello,
I've got an iMac G3 running OS 10.4.11 and would like to know if there is a way to check the status of the 2 FireWire ports without the external DVD drive that was used to install OS X. The drive stopped working and has been sent for repair and/or replacement. Any help would be greatly appreciated.

Do you want to confirm that the FireWire bus/port is operating correctly and that it's not the cause of the external DVD drive's failure? Obviously, another FireWire device would provide the answer, since you're not going to be able to check the FireWire controller chip on the motherboard.

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