Editing Macintosh IIsi Troubleshooting (section)

== SCSI and Storage Issues ==

<templatestyles src="Template:StyledTable/styles.css" />
{| class="wikitable styled-table" style="width:100%; text-align:center;"
|+ '''SCSI and Drive Problems'''
|-
! Symptom !! Possible Cause !! Recommended Action
|-
| Flashing question mark at startup || No bootable system found || Test with boot floppy; check SCSI drive; verify System Folder is blessed
|-
| SCSI drive not recognized || Incorrect SCSI ID, termination issue || Verify unique SCSI IDs; ensure proper termination at end of chain
|-
| System hangs during SCSI scan || SCSI bus conflict, bad device || Disconnect all SCSI devices; add back one at a time
|-
| Floppy drive not reading disks || Dirty heads, failed drive || Clean heads with IPA; test with different disks; may need drive replacement
|-
| Floppy disks not ejecting || Mechanical failure, eject motor issue || Check eject mechanism; clean and lubricate; may need gear replacement
|}

=== SCSI Termination ===
The IIsi's internal SCSI bus requires proper termination:
* Internal drive should be terminated if it's the only SCSI device
* If using external SCSI devices, terminate only the last device in the chain
* The IIsi logic board does not provide internal termination power by default