HP A3550A - High Availability Disk Arrays Model 20 Storage Enclosure User Manual page 259

Table 6-4 Power-Up Troubleshooting
Condition and/or symptom
Power-up tests fail
No CRU LEDs are on and the fans are
not running
Array fails to power up and the SP
displays the message "A valid
microcode image could not be found on
any database drives."
Random characters ("garbage") on
terminal display
Disk array is powering up but garbage
or nothing displays on the terminal.
Disk array fault during power-up
sequence. Array's FAULT LED on front
panel is illuminated.
Solution
Inserting a FRU while the power-up tests are running can
cause the tests to fail. Insert all FRUs and then cycle
power to rerun the power-up tests.
Indicates no AC power is reaching the disk array's power
supply unit(s). Check input AC power. If AC power is
present, remove array power supply unit(s) and check for
AC power at the internal AC power supply plug.
SP microcode is loaded from the database disk drives. If
the database disks were removed from the disk array
during installation, they may have been reinserted in the
wrong slots and SP microcode cannot be found. A slot
number label is affixed to each disk module at the factory.
Match the slot number label on the disk module to the
appropriate slot in the array.
Verify that the terminal configuration is set as follows:
Datacomm config
Baud rate 9600
Parity/Databits None/8
Termmode EM100
Check that the correct RS-232C cable is being used. See
the Reference chapter for a list of cable part numbers.
A failed CRU should not stop the initial power-up tests.
Power-up should complete and the faulted CRU should
be indicated by a CRU FAULT, REPLACE or SERVICE
LED. Replace the faulted CRU after power-up tests
complete.
The BBU may have discharged during power down.
Subsystem fault will be indicated until BBU is fully
recharged. BBU recharge message can be found in
Unsolicited Event Log in Grid Manager.
Power-Up Troubleshooting 6-11