IBM 6C1 Service Manual page 60

Symptom
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.
The SMS configuration list or
boot sequence selection menu
shows more SCSI devices
attached to a controller/adapter
than are actually attached.
The System Management
Services menu is displayed.
You have a problem that does
not prevent the system from
booting.
42
Service Guide
Action
Reseat the operator panel cable. If the problem is not
resolved, replace these parts in the following order:
1. Operator panel assembly.
Location: L1
See 4 on page 35.
2. System board (See notes on page 35.)
If the problem is fixed, go to "MAP 0410: Repair
Checkout" in the RS/6000 Eserver pSeries Diagnostic
Information for Multiple Bus Systems . If the problem
persists, go to "MAP 1540: Minimum Configuration" on
page 63 to isolate the problem.
A device may be set to use the same SCSI bus ID as the
control adapter. Note the ID being used by the
controller/adapter (this can be checked and/or changed via an
SMS utility), and verify that no device attached to the
controller is set to use that ID.
If settings do not appear to be in conflict:
1. Replace the SCSI cable.
2. Replace the device.
3. Replace the SCSI adapter (or system board if connected
to one of the two integrated SCSI controllers on the
system board). (See notes on page35 if the system board
is replaced.)
Note: In a "twin-tailed" configuration where there is more
than one initiator device (normally another system) attached
to the SCSI bus, it may be necessary to change the ID of the
SCSI controller or adapter with the System Management
Services.
The device or media you are attempting to boot from may be
faulty.
1. Check the SMS error log for any errors. To check the error
log:
a. Choose error log from the utilities menu.
b. If an error is logged, check the time stamp.
c. If the error was logged during the current boot attempt,
record it.
d. Look up the error in Chapter 5, "Error Code to FRU
Index", on page 115 and perform the listed action.
e. If no recent error is logged in the error log, continue to
the next step below.
2. Go to "Boot Problems/Concerns" on page 110.
3. Go to "MAP 1540: Minimum Configuration" on page 63.
Go to the "Fast Path MAP" in the RS/6000 Eserver pSeries
Diagnostic Information for Multiple Bus Systems .