Chapter3 Troubleshooting
Problem-Solving
3-12
Cisco 1760 Modular Access Router Hardware Installation Guide
78-13342-03
Troubleshooting the Power System
Table 3 -3 lists symptoms of and possible solutions to power problems.
Router powers on and boots only
when a particular WIC or VIC is
removed from the router.
•There may be a problem with the WIC or VIC. Consult your
Cisco reseller.
•Confirm that the Cisco IOS release installed in the router
supports the WIC or VIC. The Cisco WAN Interface Cards
Hardware Installation Guide lists the software requirements for
each card.
Router powers on and boots only
when a particular cable is
disconnected.
There might be a problem with the WIC or VIC cables. Consult your
Cisco reseller for warranty information.
Table3-2 Troubleshooting WICs and VICs (continued)
Symptom Possible Solutions
Table3-3 Troubleshooting the Power System
Symptom Possible Solutions
Router shuts down after being on for
a short time.
•The router may be overheating. Make sure that nothing is
blocking the fan vents on the side of the router.
•Make sure that the area in which the router is installed
meets the environmental site requirements given in
Appendix A of this guide and in the “Site Requirements”
section in the Regulatory Compliance and Safety
Information for Cisco 1700 Routers document that came
with your router.
•If the PWR LED is not on, the power supply has failed.
The router attempts to boot, but all
LEDs remain off.
The power supply has failed. Return the router to your Cisco
reseller.