Emits noise when plugged into firewire port

M

MMak

Registered
When I plug in the memory card reader into my PowerBook's built-in firewire port, the device emits this high pitched buzzing noise. I thought the reader was defective, so I had it replaced and now on my second one and it's still making that same noise. It's to the point where I can't have the reader plugged in at all times because it's excessively noisy.

My external hard drive makes a buzzing noise too, but in order for me to hear it, I have to put my ear against the drive. And the external drive isn't even powered on, it's only plugged into the firewire port!

Is my PowerBook's firewire port defective? I don't have another firewire port in another computer to test it out.

Any info appreciated!

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PowerBook Titanium 1GHz, 1GB RAM, 60GB drive, Superdrive
Mac OS 10.3.5
 
Any ideas what may be wrong here? Should I stop thinking about the strange noise, move on, and do something when it actually breaks/doesn't work?
 
Weird, I noticed when the Powerbook is running on battery the firewire devices don't make that noise. When power adapter is plugged in, the noise reappeared.
 
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