Im having the same issue, is there a fix for this? I have been using an old HP laptop that worked fine.. Tried booting it up on the asus g73 after selecting the usb drive to boot first but just get a flashing cursor, doesnt even make it to the boot menu...
Any chance of a bios fix for this??? quite bad not being able to boot from an external usb drive..
update: upgraded to latest bios for g73 and still no joy.
update: speaking of which the booting section in this bios is really limited. Shouldn't you be able to specify boot any external drive as an option as well as boot any usb card etc etc like most bioses have these days? or these years? 🙂