Installation guide

ISR651103-00 C 4-1
4 Diagnostics and
Troubleshooting
Diagnostic information about the router is available through the chassis LEDs and
the port LEDs. Diagnostic information is also available through the Router
Manager and CLI event logs and error messages. This chapter provides the
following diagnostic and maintenance information:
 Chassis Diagnostics
 “Power-On Self-Test Diagnostics” on page 4-2
 “LED Blink Patterns” on page 4-2
 “Recovering a Router” on page 4-4
Chassis Diagnostics
The chassis LEDs show chassis diagnostics as shown in Figure 4-1.
Figure 4-1. Chassis Diagnostic LEDs
This section describes the following conditions:
 “Input Power LED is Off” on page 4-2
 “System Fault LED is On” on page 4-2
Power LEDHeartbeat LED System Fault LED