5-15 Maintenance and troubleshootingWARNING!An IE4300-12P-AC switch must be installed, used, and maintained in an area restricted only fortrained and qualified technical engineers.Power failureAn IE4300-12P-AC switch has an AC power receptacle. An IE4300-12P-PWR switch uses two DCpower receptacles. A power status LED is provided for each power input line to indicate the powerinput status.Table5-1 AC power input status LEDMark Status DescriptionPWR Steady green Normal AC power inputOff Abnormal or no AC power inputTable5-2 DC power input status LEDMark Status DescriptionPWR Steady green Normal DC power inputOff Abnormal or no DC power inputAbnormal or no AC power inputSymptomThe PWR LED for the AC power supply is off.ResolutionTo resolve the issue:1. Verify that the AC power cord is connectedly correctly. Make sure the AC power receptacle onthe switch and the AC power outlet are in good condition.2. Verify that the external AC power system is operating correctly.3. Verify that the operating temperature of the switch is in an acceptable range, and adequateventilation is provided for the switch.Over-temperature can cause the power supply to stop working and enter self-protection mode.4. If the issue persists, contact H3C Support.