Your usb plug on the computer doesnt work what do you have to buy to replace it?
It depends on what type of computer you are talking about. If it
is a laptop, the USB ports are often directly connected to the
motherboard, and replacing the USB ports alone is very difficult.
If it is a desktop PC, again it depends on whether the USB ports
are directly attached to the motherboard or whether they are on a
separate card. If attached directly to the motherboard it is
difficult to replace. Probably your best solution is to buy a USB
PCI card.
http://www.dabs.com/ProductView.aspx?Quicklinx=3ZRC&CategorySelectedId=11139&PageMode=1&NavigationKey=11139,48720000&InMerch=1
You can slot this directly into a spare PCI slot on your
motherboard and very often the computer will automatically install
it for you.