Power supply and fan assembly status LED
1 Power supply and fan assembly 2
2 Power supply and fan assembly 1
3 Power supply and fan assembly 1
status LED
4 Power supply and fan assembly 2
status LED
FIGURE 30 Nonport-side LEDs
Power supply and fan assembly status LED
Refer to the following table to interpret the power supply and fan assembly status LED during normal
operation.
TABLE 13
Power supply and fan assembly status LED patterns during normal operation
LED color Description Action required
No light Power supply and fan assembly is not receiving
power, or is off.
Verify that the power supply and fan
assembly is on and seated and the
power cord is connected to a
functioning power source.
Steady green Power supply and fan assembly is operating
normally.
No action is required.
Flashing green (for
more than 5
seconds)
Power supply and fan assembly is faulty for one of
the following reasons:
• The assembly is switched off (flashing for ~ 5
seconds, then off).
• The power cable is disconnected (flashing for ~ 5
seconds, then off).
• The power supply and fan assembly has failed.
NOTE: When the device is first powered on, the
power supply and fan assembly status LED flashes
until POST has completed.
Try one of the following:
• Check the power cable connection.
• Verify that the assembly is powered
on.
• Replace the power supply and fan
assembly.
Interpreting the POST results
Each time the switch is powered on, rebooted, or reset, the switch performs a power-on self-test
(POST). Total boot time with the POST can be several minutes. The POST can be omitted after
subsequent reboots by using the fastboot command or entering the diagDisablePost command to
Hardware Installation Guide 71
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