Cisco Systems CISCO7201 manual Troubleshooting the Power Subsystem

Chapter 5 Troubleshooting Initial Startup Problems

Problem Solving Using a Subsystems Approach

•The PWR OK (power ok) LED is green when the system has powered on and is attempting to boot the software, or has booted the software.

•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 5-8.

•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 Appendix A, “Specifications” to verify that the terminal is set correctly and that it is properly connected to the console port. If the ALARM LED is on, check the STATUS LED and PWR OK LED.

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	Troubleshooting the Power Subsystem
Symptom		Possible Cause	Possible Solution
System begins power		System has failed to boot	Power off, and reboot the system. Check
on, amber STATUS		Cisco IOS.	to be sure you are using the correct
LED comes on.			Cisco IOS release. If Cisco IOS does not
			boot, and the green STATUS LED is not
			displayed, contact a service
			representative.
System does not		AC power cable not fully seated at	Turn the router power switch to the
power on.		system or at the wall outlet (power	standby position () and reseat the AC
		source).	power cable at the system or at the wall
			outlet (power source).
		DC power cable not turned on at the	Turn the router power switch to the
		panel board of the circuit breaker.	standby position () and locate the circuit
			breaker on the panel board that services
			the DC circuit, switch the circuit breaker
			to the on position.
		AC internal power cables are not	Turn the router power switch to the
		fully seated; from the power supply	standby position () and unplug the router
		to the system board, from the power	power cable. Open the cover and check
		supply to the power switch, and the	the power supply cable connections.
		power supply to the power	Reseat the cables if necessary. Replace
		connector.	the cover, plug in the power cable, and
			power on the router.

Cisco 7201 Installation and Configuration Guide

5-4 OL-11364-04