Macintosh LC external SCSI not functioning

[JRL]

So on my original Macintosh LC (the one I just rebuilt) it refuses to play nice with any external SCSI device.

The weird thing is that internal SCSI works fine, and it boots off an internal hard drive normally with no issues.

Could it be possible that the SCSI port is bad? Thanks!

-JRL

 

[porter]

Could it be possible that the SCSI port is bad? Thanks!

It's always possible.

Have you gone though all the options, with/without termination, check ids, with/without internal drive connected. With SCSI-probe.

 

[JRL]

Regardless of SCSI IDs, I still get a grey screen. I'd like to try SCSIProbe, but the problem is that if I connect ANY external SCSI device, I get a grey screen, and the floppy drive doesn't respond to a disk at all. I've already tried without termination, but still the same result.

I will try without the internal hard drive; thanks for the suggestion!

-JRL

 

[Outlander]

Regardless of SCSI IDs, I still get a grey screen. I'd like to try SCSIProbe, but the problem is that if I connect ANY external SCSI device, I get a grey screen, and the floppy drive doesn't respond to a disk at all. I've already tried without termination, but still the same result.
I will try without the internal hard drive; thanks for the suggestion!

-JRL

sounds like a termination issue.

Try this, boot off a floppy, or the internal HD, then once the machine is up, open up Drive Setup, hook-up the external SCSI device(I use to hot swap SCSI drives all the time, never burnt one out), then re-scan the SCSI bus(es) in Drive Setup. Have you tried only one external device, or more? Oh yeah... and don't forget to try 2, or 3 different SCSI cables too just to verify it's not the cable.

 

[JRL]

Alright, thanks Outlander! I will definitely get around to trying that.