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Cisco 1750 Router Hardware Installation Guide
78-6169-02
Troubleshooting the Power System
If the router external power supply fails, return it to your Cisco reseller. Table 3
lists symptoms and possible solutions of power problems.
Router powers on and boots only
when a particular WIC or VIC is
removed from the router.
• 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.
• The router might be overheating. Contact your Cisco reseller.
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.
Table 2 Troubleshooting WICs and VICs (continued)
Symptom Possible Solution(s)
Table 3 Troubleshooting the Power System
Symptom Possible Solution(s)
Router shuts down after being on for
a short time.
• Make sure that the area in which the router is installed
meets the environmental site requirements in the
“Technical Specifications” appendix in this guide and in
the “Site Requirements” section in the Regulatory
Compliance and Safety Information for the Cisco 1600 and
Cisco 1700 Routers document that came with your router.
• Make sure nothing is blocking the fan vent on top of the
router.
• If the front-panel 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.