Most likely yung power adapter lang yung nasira.
Nangyari na sa kin yan with two different soundcards and a mixer, parating kong nakakalimutan i-check kung 110 pala.
In all cases, ok pa yung unit. The stock adapter, I would assume, should have a fuse of its own so malamang yun yung nasunog.
I'd suggest you look for an adapter which gives you the same output (and kung meron, na 220V input para safe), tapos test mo kung ok pa yung unit
In any case, hindi naman unfixable yan e