Apple PowerBook 165 - Manual (Page 52)

Troubleshooting Symptom Charts/Peripherals - 28
Peripherals
I/O devices are
unrecognized or
garbage is
transmitted or
received
1 Verify that System is 7.1 or later.
2 Check cables.
3 Verify that SCSI device has standard Apple terminator.
4 Verify that SCSI select switch setting on external device is
unique.
5 Test device with known-good computer.
6 Replace daughterboard.
7 Replace motherboard.