Symptom Action
The system does not respond to the password
being entered or the system login prompt is
displayed when booting in service mode.
Verify that the password is being entered from
the ASCII terminal or keyboard defined as the
system console. If so, then the keyboard or its
controller may be faulty.
1. If entering the password from the keyboard
which is attached to the system, replace the
keyboard. If replacing the keyboard does not
fix the problem, replace the I/O board. (See
notes on 2-1.)
2. If entering the password from a keyboard
which is attached to a ASCII terminal, use
the Problem Determination Procedures for
the ASCII terminal. Make sure the ASCII
terminal is connected to S1. Replace the
I/O board if these procedures do not reveal
a problem.
3. If the problem is fixed, go to "MAP 410:
Repair Checkout" in the
IBM RS/6000
Diagnostic Information for Multiple Bus
Systems
. If the problem persists, go to
“MAP 1540: Minimum Configuration” on
page 2-31 to isolate the problem.
No codes are displayed on the operator panel
within a few seconds of turning on the system.
The operator panel is blank before the system is
powered on.
Reseat the operator panel cable. If the problem
is not resolved, replace these parts in the
following order:
1. Operator panel assembly. Update the VPD
information in the new operator panel.
2. I/O board (See notes on 2-1.)
3. If the problem is fixed, go to "MAP 410:
Repair Checkout" in the
IBM RS/6000
Diagnostic Information for Multiple Bus
Systems
. If the problem persists, go to
“MAP 1540: Minimum Configuration” on
page 2-31 to isolate the problem.
2-6 Service Guide
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