As far as I know, the 5v USB circuit isn't related to the 12v power.
But if your ferrite AFB26 is damaged, it could be the reason why you have the failure.
You can replace it with a 0ohm resistor, at least for testing purpose.
I also have some spare ferrites. I can send you 1 or 2 from France for the cost of shipping, shouldn't be more than 1.5
Ferrites are used as a filter for bad quality power source.
When shorted, they can act somehow like a fuse, even if they aren't very good at this. They often damage the surrounding components or the copper tracks when melting.
I'd also check your USB power source. Maybe something is wrong with its voltage.
Thank you for your suggestions and offer , I replace this with O-Ohm i try to see if it works for longer time ,i use a good PC - Powersource , so maybe there are no negative effects , i hope so.