Cisco Catalyst 9400 Series Troubleshooting Manual page 6

Restoring the Default Mode of the Power Button for a DC Power Supply Module
a) Check if you have pressed the power button for two seconds to turn on the module.
b) Check if the INPUT LED is on; if it is not, follow the steps to troubleshoot the INPUT LED first (Step
1).
c) Check if the release latch has been pushed in to lock it.
Step 3
The FAIL LED should be OFF for normal operation. If the FAIL LED is red, perform the following steps:
a) Check the power button.
If the power button on the front panel of the module is turned off after DC input is applied, the FAIL LED
will be solid red until you press the power button for two seconds to turn it on again.
b) Inspect the module.
Remove the power supply module 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 may lie with the first power supply bay and not the power supply module. Call Cisco Technical
Assistance Center
c) Test with another spare.
If a second power supply module is available, install it in the second power supply bay.
1. Check that the INPUT LED is on for the second power supply, and that the FAIL LED is off.
2. If the INPUT LEDs for this second power supply is not on, repeat the procedure to troubleshoot
3. If the FAIL LED for this second power supply is on, repeat steps to troubleshoot the FAIL LED (Step
Step 4 Contact Cisco Technical Assistance Center.
If you are unable to resolve the problem, or if you determine that either a power supply or backplane connector
is faulty, contact Call Cisco Technical Assistance Center
Restoring the Default Mode of the Power Button for a DC Power Supply Module
If you are unsure of whether the power button of a DC-input power supply module is in the auto-on mode or
the protected mode, you can restore the default mode (auto-on). Begin by checking the following:
1. The number of power supply modules currently configured
2. If the 3.3-VDC standby output is active (applied)
Depending on the conditions that apply, take the required action to restore the default mode of the power
button, as shown in the following table:
Troubleshooting
6
(Cisco Support) for further instructions.
INPUT LED of the second power supply (Step 1).
3).
(Cisco Support) for instructions.
Troubleshooting