Sun Microsystems 5500, Reference Manual

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Chapter 10 Flow Diagrams for Troubleshooting 10-3
10.2 System Cannot Boot
FIGURE 10-2
Diagnosing Operating System Problems
INDICATION
System cannot boot
or cannot load UNIX
System boots with errors
or runs with
intermittent problems
Begin
End
TEST/PROCEDURE
Check LEDs on front panel
or clock+ board.
Are CPU/ board LEDs
cycling?
Is boot disk running?
Is OpenBoot set to boot
automatically?
In OpenBoot, examine system
status:
— Connect a terminal to serial
port A on the clock+ board
— Reset the system
— Type
v s
— Select system configuration:
option 0
— Select: option 2
— Replace indicated
components
Check message files.
Run SunVTS to test suspected
boards, CPUs, SIMMs, power
supplies, other devices.
Start
prtdiag
log file to collect
error messages.
“Lost carrier” or “no carrier.”
REFERENCE
See
TABLE 9-1
.
See
TABLE 9-2
.
Refer to SunVTS User’s
Guide.
See Section 9.3.3.2 “Running
prtdiag
.”
See Section 9.4.1 “Failure of
Network
Communications.”