hi guys
i have little problem here
one of usb's works normally with usb 3 and usb 1.1 devices but no action on usb 2 devices
usb 2 device turn on but no detect

other usb port works normally

it doesn't look like driver problem because it not detect even in boot

any idea how can it happen?

PCH begins to die. One day last port will stop to work too.

so nothing can i do for repair?just watch it die?:'(

Try to update firmware from official site and check voltage on USB ports(it should be 5V) thats all what you can.