Yes did that as well. I think I'm going to reflash the sd card. because something got broken when the hashrate was at 0. Maybe I'll even reformat the USB.
ok - I apologize if I was providing steps that you already took - just trying to remember all the hangups I had to getting mine started. I would start with the SD card before going thru the USB reformat.
let me know how it goes! I hope you get back up and running soon!