So I recently acquired a g4 cube in very good condition. However, I have since learned that the ethernet port appears to be faulty. The card is detected in the OS, but there's no effect when plugging in the cable. OSX doesn't detect it and the switch LEDs stay off. The ethernet cable is known to be good. I'm unable to see any damage on the card itself. Is there any resolution other than replacing the card? The few places that sell them are asking for crazy amounts.