PSW125 Blown fuse and keeps blowi

Hey mine has the removable power cord but I do not see another fuse besides the one on the plate. Blows fuses as soon as I put one it. Had this sub for years with no problems now it’s junk because it’s $150 from Polk for a new amp. Is there anything else I can do? I love this sub! I’ve recommended it to so many people now I’m halfway regretting it!