Sorry can't as MSI doesn't hand out schematics.
However, it's probably useless, as it's using an SIS chipset, so you probably killed part of the southbridge.
As SIS works like this:
As you can see, it's the SB doing USB itself, not a separate chip.
I can't get the schematics, but I'm pretty sure it's the chipset.
Only hope you have is sent the laptop for repairs to MSI.