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Problem determination when unable to load diagnostics
Use this procedure to obtain an error code. Service personnel use the error code to determine which field
replaceable units (FRUs) are needed to restore the system to correct operation.
Step 1. Considerations before running this procedure
v The diagnostics uses an ASCII terminal attached to serial port 1.
v Go to "Step 2".
Step 2
Do you want to run online diagnostics (as opposed to standalone)?
NO
Go to "Step 4".
YES
Go to "Step 3".
Step 3
This step attempts to load online diagnostics in service mode.
1.
If the system software is running, shut down the system as described in "Stopping the system" on
page 310, without removing power.
2. Turn on the power.
3. If the keyboard indicator is displayed, press 6 on the ASCII keyboard to indicate that diagnostics are
to be loaded.
4. Enter any requested passwords.
5. Follow any instructions to select a console.
6. Wait until the diagnostics load or the system appears to stop.
Did the diagnostics load?
NO
Go to "Step 5".
YES
Go to "Step 6" on page 254.
Step 4
This step loads the standalone diagnostics.
1. Turn off the power.
2. Turn on the power.
3. Insert the diagnostic CD-ROM into the CD-ROM drive.
4. If the keyboard indicator is displayed, press 5 on the ASCII keyboard to indicate that diagnostics are
to be loaded.
5. Enter any requested passwords.
6. Follow any instructions to select a console.
7. Wait until the diagnostics load or the system appears to stop.
Did the diagnostics load?
NO
Go to "Step 5".
YES
Go to "Step 6" on page 254.
Step 5
Starting at the top of the following table, find your symptom and follow the instructions given in the Action
column.
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NAS Gateway 500 Service Guide
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