Troubleshooting The Processor Subsystem; Troubleshooting The I/O Controller; Troubleshooting The Network Processing Engine - Cisco Router 7204 Installation And Configuration Manual

Troubleshooting the Processor Subsystem

Note After powering off the router, wait at least 30 seconds before powering it on again.
If you are unable to resolve the problem or you determine that either a power supply or chassis connector
is faulty, contact a service representative for instructions.
Troubleshooting the Processor Subsystem
The processor subsystem comprises the I/O controller, network processing engine, and all port and
service adapters. The I/O controller and network processing engine are required system components.
The system cannot operate unless the I/O controller and network processing engine are installed
properly; however, the system can operate without any port or service adapters installed as long as none
are in partial contact with the midplane pins. A port or service adapter that is partially connected to the
midplane will send incomplete signals to the processor, which will fault the PCI bus and cause the system
to hang. Therefore, first ensure that the I/O controller and the network processing engine are installed
properly and the system software has initialized successfully. Then, if necessary, you can troubleshoot
individual port and service adapters.

Troubleshooting the I/O Controller

The procedures in this section assume that the I/O controller, network processing engine, and router
itself are in the original factory configuration, and that you have not made changes to your configuration
file.
If the I/O controller LEDs do not go on as expected (refer to the
on page
•
•

Troubleshooting the Network Processing Engine

The procedures in this section assume that the I/O controller, network processing engine, and router
itself are in the original factory configuration, and that you have not made changes to your configuration
file.
Cisco 7204 Installation and Configuration Guide
5-6
If not, repeat each of the above procedures for the second power supply.
–
5-3" ), check the following items to help isolate the problem:
Do all of the I/O controller LEDs remain off when the system power switch is turned on?
– If the LEDs stay off, first refer to the
page 5-5 and "Troubleshooting the Cooling Subsystem" section on page 5-7
the fans and the power supply are functioning properly.
– If the power supply and fans appear operational but none of the I/O controller LEDs are on,
suspect that an improperly connected I/O controller or port adapter has hung the system.
Tighten all captive installation screws, and then restart the system.
With the power supply turned off, reseat the I/O controller in its slot and restart the router.
–
Is the I/O controller enabled LED on?
– If yes, the system software has initialized successfully, and the system is operational.
– If the enabled LED remains off, the system detected a processor hardware failure. (This LED
should be on in normal operation.) Contact a service representative for instructions.
Chapter 5
""Identifying Startup Problems" section
"Troubleshooting the Power Subsystem" section on
Troubleshooting the Installation
to ensure that both
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