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8
Troubleshooting
This chapter explains how you can troubleshoot a specific problem at
system power-up, such as abnormal LED activity or no system power.
Diagnosing Problems
The information in this chapter can help you identify problems by
observing diagnostic signs. Your initial response to a system problem
should be to check power connections, observe the system’s LEDs
carefully, and check cable connections on the system modules.
If a problem is beyond the scope of this chapter, refer to Appendix F,
Customer Service for instructions.
Power Failure
When you power up the system and it does not respond normally, refer to
the troubleshooting suggestions in Table 8-1.
Topic Page
Diagnosing Problems 8-1
Troubleshooting Power Failures 8-2
Understanding Status LEDs 8-3
Monitoring Temperatures of Modules 8-10
Resetting Line Modules and SRP Modules 8-11
Double-Bit Errors on SRP Modules 8-11