contain the ID of the module it is looking for (18) and > 5 and 7 contain an error code (07). the manual, but I have not found it yet. (Please > > bear with me, I haven't seen a real live 5100 in aver 20 years, and I have never worked on one before). My 5100 maintenance manual is buried, but my 5110 manual says that error "07" is a CRC error in the ROS. I have notes diagnosing a similar problem indicating that one possible solution is to remove any tape in the tape drive before powering on. Seems unlikely that this would work, but you never know.