Troubleshooting A Power Supply Module; Useful Cisco Ios Commands - Power Supply; Troubleshooting An Ac-Input Power Supply - Cisco Catalyst 9400 Series Hardware Installation Manual

Troubleshooting a Power Supply Module

Troubleshooting a Power Supply Module

Useful Cisco IOS Commands - Power Supply

You may use the following Cisco IOS commands in the priviledged EXEC mode, to monitor the status, load,
and activity of a power supply module.
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Troubleshooting an AC-Input Power Supply

To help isolate a power subsystem problem, follow these steps:
Procedure
Step 1
The INPUT should be solid green for normal operation. If the INPUT LED is off, take the following steps:
a) Ensure that the power supply is flush with the back of the chassis by gently inserting it all the way in until
it stops. You should feel the retaining metal latch, on its right side, click into place. The unit should not
be removable without depressing this latch towards it.
Note
b) Unplug the power cord by loosening the cord retainer and physically reinstalling the power supply, plug
in the power cord and tighten the cord retainer around it.
c) If the INPUT LED remains off, there may be a problem with the AC source or the power cable connection.
Also check the circuit breaker of the AC source. Connect the power cord to another power source if one
is available. Verify that the source power is within the acceptable specifications of the power supply.
d) If the LED remains off after you connect the power supply to a new power source, replace the power cord.
e) If the LED still fails to light when the switch is connected to a different power source with a new power
cord, the power supply is probably faulty. You may need to replace the power supply.
Step 2 The OUTPUT LED should be solid green for normal operation. Blinking green indicates that the unit is asleep
in standby mode.
Step 3 If the FAIL LED is red, take the following steps:
a) Remove the power supply from the bay and visually inspect the rear of the power supply module connector.
If there is no damage, try installing it in another empty power supply bay, if available. Do not touch the
back of the power supply module during this inspection. If the OUTPUT LED turns green, the problem
Cisco Catalyst 9400 Series Switches Hardware Installation Guide
132
Switch# show power detail
If FAIL LED is red, the show power command output reports the power supply module as faulty.
Switch# show idprom power-supply slot-number
Switch# show module
If the show module command output shows a message that states "not enough power for module," check
the corresponding power supply specifications here:
may be a problem with the power source itself.
You should be unable to remove the power supply from the system when the power cord is
fully inserted and installed with the cord retainer.
Power Supply Specifications, on page
Troubleshooting
148. There