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Table of Contents
8 Troubleshooting ········································································································································8-1
Troubleshooting MPU ·····························································································································8-1
Symptom 1 ······································································································································8-1
Symptom 2 ······································································································································8-1
Symptom 3 ······································································································································8-2
Troubleshooting LPUs·····························································································································8-2
Symptom 1 ······································································································································8-2
Symptom 2 ······································································································································8-2
Troubleshooting the Power System ········································································································8-3
Symptom 1 ······································································································································8-3
Symptom 2 ······································································································································8-3
Troubleshooting Fans ·····························································································································8-3
Symptom 1 ······································································································································8-3
Symptom 2 ······································································································································8-4
Troubleshooting the Configuration System·····························································································8-4
No Display on the Terminal Screen·································································································8-4
Illegible Characters on the Terminal Screen ···················································································8-4
Serial Port Response Failure ··········································································································8-5
Using the AUX Port as Backup Console Port ·························································································8-5
Password Loss········································································································································8-6
Troubleshooting the Cooling System ······································································································8-6
Troubleshooting Application Upgrade·····································································································8-7
Response Failure of the MPU Serial Port ·······················································································8-7
Troubleshooting TFTP Upgrading ···································································································8-7
Troubleshooting FTP Upgrading ·····································································································8-8
Troubleshooting Application File Missing Errors·····················································································8-9