Sierra 12.1 doesn't load os anymore

i installed an internal usb 2 cable to plus an usb to 3.5mm jack and everything worked fine. then a day later , i tried to boot in osx and it didn't go further than the beginning of the load bar, when i boot in verbose mode it says AppleUSBlegacyRoot@: Appl_ then hangs there. any solution ?

here are the images

submitted by /u/GFlunk
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