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Chapter 8. Hardware problem determination
This chapter provides information about using standalone or online diagnostics to help you solve hardware
problems.
Problem determination using the standalone or online diagnostics
Use this procedure to obtain a service request number (SRN) when you are able to load the standalone or
online diagnostics. If you are unable to load the standalone or online diagnostics, go to "Problem
determination when unable to load diagnostics" on page 252. The service organization uses the SRN to
determine which field replaceable units (FRUs) are needed to restore the system to correct operation.
Step 1. Considerations before running this procedure
Note: See the operator manual for your ASCII terminal to find the key sequences you need to respond to
the diagnostic programs.
v The diagnostics uses an ASCII terminal, or its equivalent, attached to serial port S1 as a console.
v This procedure asks you to select the type of diagnostics you want to run. If you need more information
about the types, see Chapter 6, "Using the online and standalone diagnostics", on page 239.
v Go to "Step 2".
Step 2
Is the attention LED on?
NO
Go to "Step 3".
YES
Go to "System LEDs" on page 36 for more information about your system LEDs.
Step 3
Do you want to run online diagnostics (as opposed to standalone)?
NO
Go to "Step 16" on page 250.
YES
Go to "Step 4".
Step 4
Determine if the operating system is accepting commands.
Is the operating system accepting commands?
NO
The system must be turned off in order to run diagnostics.
Verify with the system administrator and users that the system can be turned off. If so,
turn off the system unit and go to "Step 7" on page 248.
YES
Go to "Step 5" on page 248.
247
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