Years ago I packed this unit away during a move. It surfaced a couple of weeks ago. After inserting a new battery and attaching it to the HPIL loop with my HP-71B, it worked perfectly (reading and writing files) for about five minutes. Now however, it seems to work the drive motors, passes information through the HPIL to other devices, but doesn't seem to read or write to the tape. The tape mechanically actuates like it is writing or reading a file but then I get an error message "Device not found."
Does anyone out there have any ideas about what's wrong and how to fix it or get it fixed?