Mac Pro3,1(MA970) 2008 early The two front USB ports fail. I plug a udisk to one of them, but the mac doesn't respond. I plug a mouse to one of them, doesn't either. If I plug the udisk and the mouse to the back USB ports, they works. The front USB ports are soldered on the front panel module, and they are linked to a port on the mainboard by a cable. I have taken off the front panel module and installed it on another mac, it works perfectly and the two USB ports work well. The USB cable is good as well. So I think the USB ports on the mainboard is broken. There are two similar ports on the mainboard near the USB port, but the text beside on the mainboard is 'SATA'. So I don't think the USB wire can be linked to those ports. Has anyone met this problem? How did you solve it? If there is another USB port on the mainboard, it will be wonderful.