I have a FiBER NAM on a MICS system. When I try to bring up the NAM, it beeps a couple time then the display on the NAM (the red 2 digit display) says 7F and it does nothing further. I was told this is a floppy disk drive problem or there is a disk in the floppy drive (there's no disk in there) and I changed the floppy drive. Still the same problem. What can I do?