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Safety Precautions and Tools Requirements 2-3
2
OFF The principal switch is in the OFF
position.
STAND-BY The system is in standby mode and
the operating system is halted. The
circuit breaker can be turned off.
DIAGNOSTICS System is powered on. If system is
rebooted, POST will display extended
diagnostic messages.
CYCLING System or board is operating
normally.
LOCKED Board: 1/4-turn access slot is locked.
System: running in secure mode and
will not respond to commands from
the console. The key can be removed.
UNLOCKED Board 1/4-turn access slot is
unlocked.
POWER Board is receiving DC power.
SERVICE System has detected a hardware
failure.
PROTECTIVE EARTH Earth ground.
CHASSIS Frame or chassis ground.