52TroubleshootingThis chapter includes these sections:• Power supply system failure• Fan failure• Configuration terminal problems• Password loss• Cooling system failure• Interface module, cable, and connection failureNOTE:• The barcode stuck on the router chassis contains production and servicing information. Before you returna faulty router for serving, provide the barcode information of the router to your local sales agent.• Keep the tamper-proof seal on a mounting screw on the chassis cover intact, and if you want to open thechassis, contact the local agent of H3C for permission. Otherwise, H3C shall not be liable for anyconsequence caused thereby.Power supply system failureThe router cannot be powered on. The power LED on the front panel is off.Follow these steps to troubleshoot the power supply system:Step1 Turn off the power switch.Step2 Open the chassis cover.Step3 Check whether the power cord is properly, firmly connected.Step4 Check whether the power cord is damaged.If the cause cannot be located in the steps above and the problem persists, contact your local salesagent.Fan failureAfter the router is booted, the following information appears:%Jun 22 16:11:37:485 2010 H3C DEV/4/FAN FAILED:Fan 1 failed.Follow these steps to troubleshoot the fans:Step1 Turn off the power switch.Step2 Open the chassis cover.Step3 Check whether the fans are in position.Step4 Check whether any fan has stopped running. If yes, contact your local sales agent to have the fanreplaced.
