Apple Performa 6400/180 - Manual (Page 87)

Troubleshooting Symptom Charts/CD-ROM Drive - 13
CD-ROM Drive
Computer cannot
mount known-good
CD-ROM discs
1 Check that CD-ROM drive software is installed correctly.
2 Reseat CD-ROM adapters.
3 Check SCSI ID setting. (Internal CD-ROM drive was
originally set to 3 at factory.)
4 Replace CD-ROM drive.
5 Replace chassis/wiring harness.
Note:
The chassis/wiring harness is not a separate
replacement part. Order the metal chassis that contains the
chassis/wiring harness.
When an internal and
external SCSI device
are present, only one
starts up
Verify that ID switch setting on external SCSI device is higher
than 0. Verify that ID setting on external SCSI device does not
duplicate ID settings on other external SCSI devices.