Automatic Configuration
Warning: A customized setup configuration (other than
the default settings) might have been set on the computer
you are servicing. Running Automatic Configuration might
alter those settings. Note the current configuration settings
(using the View configuration or Set and view SCSI
device configuration option) and verify that the same
settings are in place when service is completed.
Missing SCSI Device
The 3550 Expansion Unit features a built-in SCSI
controller.
The built-in SCSI controller supporting the missing device
might be defective.
1. Power-off the 3550 Expansion Unit and disconnect all
internal and external SCSI devices from the 3550
Expansion Unit.
Warning: See “Automatic Configuration” before
continuing.
2. Power-on the 3550 Expansion Unit and run Automatic
Configuration.
If the built-in SCSI controller is not on the
Installed Device List in advanced diagnostics,
replace the system board of the 3550 Expansion
Unit.
3. Reconnect the devices to the 3550 Expansion Unit.
Note: The built-in SCSI controller includes an active
terminator. This terminator automatically
works when an external SCSI device is
attached.
4. Go to “Undetermined Problem” on page 333.
Missing Non-SCSI device
If a non-SCSI device is missing from the list, replace the
missing device.
If more than one non-SCSI device is missing, isolate them
one at a time until you find the device causing the failure.
Expansion Unit (3550)
335
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