Rupes 15.

Hey, how’s it going AGO? Last night I had a correction job scheduled. I got to the location washed, deconed and prepped the vehicle for polishing. I decided that the rupes 15 would be my starting point. Anyhow, after plugging it in, I realized that the darn machine would not turn on. I’ve read here that the brushes could go bad and would need replacing. Is the machine not coming on a cause of bad brushes or would/could that be the cause of a bad power cord? I’ve never experienced this and have never had to change brushes or cords. Any/all advice would be greatly appreciated.