Troubleshooting the Initial Hardware Configuration 4-3
Environmental Reporting Features
• System boots, but console screen is frozen.
— Check the external console connection.
— Verify the console baud rate in the documentation for the terminal.
• System powers on and boots with a particular network processor module disconnected from the
motherboard.
— Suspect the network processor module.
• System powers on and boots with a particular network processor module or cable disconnected.
— Suspect the network processor module or cable.
Environmental Reporting Features
If the router is operating at an abnormally high temperature, the following message will be
transmitted to the console screen:
%SYS-1-OVERTEMP: System detected OVERTEMPERATURE condition. Please resolve cooling
problem immediately!
Typical causes of abnormally high system temperature follow:
• Fan failure
• Air conditioner failure in the room
• Air blockage to cooling vents
Reading Front-Panel LED Indicators
The router’s front panel has LED indicators for determining system performance and operation at a
glance. The following sections contain information on reading the LED indicators.
System LED Operation
Figure 4-1 shows the network activity and health indicators and the run and power lights on the
router front panel.
Figure 4-1 Cisco 4000 Series—Front Panel Indicators
Network activity LEDs
Run LED
H2427
2
DATA
OK
3
DATA
OK
1
DATA
OK
Health LEDs
Power LED
POWER
OK
SERIES
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