Cisco 2600 Series Hardware Installation Guide
Isolating Problems
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Troubleshooting the Power and Cooling Systems
Check the following items to help isolate the problem:
• When the power switch is in the ON position (|) and the power LED is on, make sure
the fan is operating. If not, check the fan.
• If the router shuts down after being on a short time, check the environmental conditions.
The router might be overheating, resulting in a thermal-induced shutdown. Ensure that
the chassis intake and exhaust vents are clear. Review the “General Site Requirements”
section on page 2-4. The operating temperature for the router is 32 to 104° F(0to40°C).
• If the router fails to boot, but the power LED is on, check the power supply.
• If the router constantly or intermittently reboots, there might be a problem with either
the processor or the software, or a DRAM single in-line memory module (SIMM) might
be installed incorrectly.
Troubleshooting the Ports, Cables, and Connections
Check the following items to help isolate the problem:
• If the router fails to recognize a port, check the cable connection.
• When the power switch is in the ON position (|), make sure the power LED is on. If not,
check the power source and power cable.
• If the system boots, but the console screen is frozen, verify that the console is configured
for 9600 baud, 8 data bits, no parity, and 2 stop bits.
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