Cisco CISCO1841 - 1841 Integrated Services Router User Manual

6-2
Cisco 1800 Series Integrated Services Routers (Fixed) Hardware Installation Guide
OL-6425-03
Chapter 6 Troubleshooting
Solving Problems
• Power and cooling systems—External power source, power cable, router power supply and circuit
breaker, and router blower and fan. Also consider inadequate ventilation or air circulation.
• Cables—External cables that connect the router to the network.
Troubleshooting the Power and Cooling Systems
Both the system LED and the fans can help you troubleshoot a power problem. To attempt to isolate the
problem, check the items identified in the sections that follow.
Normal Indications
With the power switch on, the normal indications are:
• SYS OK LED on green and continuous
• Fans operating
• POE LED on green and continuous if the inline power supply is installed
Fault Indications
Check the following symptoms to locate or eliminate faults in the power and cooling systems:
• With the power switch on, is the SYS OK LED on?
– If the LED is green and continuous, the router is receiving power and is functional.
– If the LED is off, check the power source and power cable.
• With the power switch on and the SYS OK LED on and green, do the fans operate?
– If no, check the fans.
– If yes, the power system is functioning.
• Does the router shut down after being on a short time?
– Check for an environmentally induced shutdown. See the “Environmental Reporting Features”
section on page 6-2.
– Check the environmental site requirements in the “General Site Requirements” section on
page 2-4.
– Check for a power supply failure by inspecting the SYS OK LED on the front panel. If the LED
is green, the power supply is functional.
• Does the router partially boot, but the LEDs do not come on?
– Check for a power supply failure by inspecting the SYS OK LED on the front panel of the
router. If the SYS OK LED is blinking or continuous green, the power supply is functional.
– If the SYS OK LED is not on, see the “Cisco One-Year Limited Hardware Warranty Terms”
section of the Preface for warranty information, or contact customer service.
Environmental Reporting Features
The following system messages indicate environmental problems:

Cisco CISCO1841 - 1841 Integrated Services Router Specifications

General

Brand	Cisco
Model	CISCO1841 - 1841 Integrated Services Router
Category	Network Router
Language	English