Cisco 4000-M Replacement Manual page 15

Troubleshooting the Power Supply Installation
Check the following items to help isolate problems with the power supply installation:
•
With the power switch on, is the power LED on the front panel on?
— If not, check the AC or DC input, AC or DC source, router circuit breaker, and the power
— Check the power supply connection to the motherboard.
— If the power LED is still off, the problem might be a power supply failure.
•
Does the system shut down after being on a short time?
— Check the fans. If the fans are not working the system will overheat and shut itself down.
— If the fan(s) are not working, check the power supply connections to the fans.
— Ensure that the chassis intake and exhaust vents are clear.
— If you have a Cisco 4000-M, Cisco 4500-M, or Cisco 4700-M router, check the
— If you have a Cisco 4000 router, check the environmental site requirements in the section
— If you have a Cisco 4500 or Cisco 4700 router, check the environmental site requirements in
supply cable (AC) or power supply wiring (DC).
environmental site requirements in the section "General Site Requirements" in the chapter
"Preparing to Install the Cisco 4000 Series Router" in the Cisco 4000 Series Installation
Guide publication.
"General Site Requirements" in the chapter "Preparing for Installation" in the Cisco 4000
Hardware Installation and Maintenance publication.
the section "General Site Requirements" in the chapter "Preparing for Installation" in the
Cisco 4000 Series Hardware Installation and Maintenance publication.
Troubleshooting the Power Supply Installation
Replacing the Cisco 4000 Series Power Supply 15