IBM PS/2 50 Hardware Maintenance Service page 12

2.4 Non-SCSI Devices
The missing device is defective.
to "Undetermined Problem" in topic 4.0.
Note: If the number of diskette drives shown on the list is incorrect, an
error can occur during the tests.
that the drive information on the Set Configuration menu is
correct, then continue testing.
IBM PS/2 Model 50 HMS
Non-SCSI Devices
If that does not correct the problem, go
Restart the system and verify
2.4 - 1