Problem with External Hard drive connection with PowerBook

I recently bought a Seagate FreeAgent/Go 500gig portable drive (2009) that only has a USB hookup. It does not register or operate on my PowerBook (G4 2005) but works fine on my wife's MacBook (2008). It appears from other discussion boards that it may be the case that not enough power is going through the USB port to the external hard drive. If this is correct is there a recommended solution so I can use the Seagate on both computers? Is there a way to get more power through the USB port?
I'd hate to have to go out and buy another external hard drive with an external power source because it would defeat the purpose of being portable if I have to have separate outlets for both the powerbook and the external hard drive (not to mention more cords). Any suggestions would be greatly appreciated.

Are you sure an additional USB to power or "Y" cable didn't come in the box, ****123? Most USB powered drives seem to come either with a "Y" cable, or an additional USB to power cable, these days.
In fact the "Seagate Freeagent "Go" Quick Start guide (see http://www.seagate.com/staticfiles/support/freeagent/fago_mac_qsgr3.pdf ) actually shows one as necessary for using over USB (though this is the model with FW as well).
Seagate's own troubleshooting document concerning this issue can be found at http://seagate.custkb.com/seagate/crm/selfservice/search.jsp?DocId=213059&NewLan g=en
Cheers
Rod

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Andrew
Message was edited by: andrewcarter

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Sirs or madams,
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