Troubleshooting The Power System - Cisco 1720 Hardware Installation Manual

Chapter 3 Troubleshooting
Table 3-2 Troubleshooting WAN Interface Cards (Continued)
Symptom
Router boots, but the console screen
is frozen.
Router powers on and boots only
when a particular WAN interface
card is removed from the router.
Router powers on and boots only
when a particular cable is
disconnected.

Troubleshooting the Power System

Table 3-3 Troubleshooting the Power System
Symptom
Router shuts down after being on a short
time.
The router attempts to boot, but all LEDs
remain off.
The router is on, but the front-panel
PWR LED is off.
78-5405-03
Possible Cause(s)
• Make sure the console cable is securely connected to the router and to the
PC or terminal.
• Verify that the parameters for your terminal are set to the following:
— 9600 baud
— 8 data bits
— No parity generated or checked
— 1 stop bit
• Confirm that the Cisco IOS software version installed in the router supports
the WAN interface card. The Cisco WAN Interface Cards Hardware
Installation Guide lists the software requirements for each card.
• The router might be overheating. Contact your Cisco reseller.
There might be a problem with the WAN interface card or card cables.
Consult your Cisco reseller for warranty information.
If the router external power supply fails, it should be returned to your Cisco
reseller. Table 3-3 list symptoms and possible causes of power problems.
Possible Cause(s)
• Make sure that the area in which the router is installed meets the
environmental site requirements in the
appendix later in this guide and in the "Site Requirements" section in
the Regulatory Compliance and Safety Information for the Cisco 1700
that came with your router.
• If the front-panel PWR LED is not on, the power supply has failed.
The power supply has failed.
The power supply has failed.
"Technical Specifications"
Cisco 1700 Router Hardware Installation Guide
3-9