Troubleshooting The Power Subsystem - Cisco 7301 Installation And Configuration Manual
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Problem Solving Using a Subsystems Approach
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Troubleshooting the Power Subsystem
Check the following to help isolate a problem with the power subsystem:
Note
If the system powers off, wait at least one minute before manually rebooting the system, or it will pause
indefinitely.
Table 5-1
Symptom
System begins power
on, amber STATUS
LED comes on.
System does not
power on.
Cisco 7301 Installation and Configuration Guide
5-4
The native LINK LED comes on only when a router Gigabit Ethernet SFP GBIC port (0/0, 0/1, or
0/2) is receiving a carrier signal from the network. This LED remains off during normal operation
of the router unless there is an incoming carrier signal, and does not indicate startup problems.
The ENABLED LED on the port adapter or service adapter comes on when the processor completes
its initialization of the adapter for operation. An ENABLED LED indicates that the adapter is
receiving power and has been recognized by the processor; it does not indicate the state of the
individual interfaces on the adapters. If an ENABLED LED fails to come on, proceed to the
"Upgrading the Boot Helper (Boot Loader) Image" section on page
When all LEDs come on to indicate that the system has booted successfully, the initial system
banner should be displayed on the console screen. If it is not displayed, see
"Specifications"
to verify that the terminal is set correctly and that it is properly connected to the
console port.
Troubleshooting the Power Subsystem
Possible Cause
System has failed to boot
Cisco IOS.
AC power cable not fully seated at
system or at the wall outlet (power
source).
DC power cable not turned on at the
panel board of the circuit breaker.
AC internal power cables are not
fully seated; from the power supply
to the system board, from the power
supply to the power switch, and the
power supply to the power
connector
Chapter 5
Troubleshooting Initial Startup Problems
5-8.
Appendix A,
Possible Solution
Power off, and reboot the system. Check
to be sure you are using the correct
Cisco IOS release. If Cisco IOS does not
boot, and the green STATUS LED is not
displayed, contact a service
representative.
Turn the router power switch to the off
position and reseat the AC power cable at
the system or at the wall outlet (power
source).
Turn the router power switch to the off
position and locate the circuit breaker on
the panel board that services the DC
circuit, switch the circuit breaker to the
on position.
Turn the router power switch to the off
position and unplug the router power
cable. Open the cover and check the
power supply cable connections. Reseat
the cables if necessary. Replace the cover,
plug in the power cable, and power on the
router.
OL-5418-07
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