I think I picked the right machine icon.
Here are the A1225 machines that the logic boards should work from:
You know the old adage "if it ain't broke, don't fix it,"
It's working, so I wouldn't risk a major overhaul just to gain one USB port. Machines hit by lightning can have component weakening. Personally I have a 2009 MacPro that was hit and I put PCI USB & PCI ethernet cards in it to get it running. It is still running.
I would have an external backup hard drive and keep Time Machine backups.
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