There is a chance that something was burned in that circuit, that probably costs about US $0.1.
Edit:
I hope that you have not fiddled with the BIOS and did not even bother to report it in this thread.
If you have disabled USB support from within the BIOS, it is 100% your fault that the USB ports are not working.
Since the device has only USB keyboard and mouse support, if you select to disable USB support from within the BIOS, you are locking yourself out.
On every other occasion, you should be fully entitled to a replacement from the manufacturer.
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