5-2Power Supply FailureYou can check whether the power system of the switch fails by viewing the hot-swappable PWR1 orPWR2 LED on the front panel and the LED on the power module. When the power supply systemfunctions normally, the corresponding LEDs should be ON. Otherwise, please check whetherz The switch power cable is properly connected.z The power supply meets the requirement.To replace the hot-swappable power module, refer to H3C S5810 Series Ethernet Switches InstallationManual for detailed operation steps.Fan Tray FailureThe fan tray do not have status LEDs. You can check the system LED and the seven-segment LED ofthe device to determine whether the fan tray operates normally. If the fan tray fails, the two LEDs give anindication, as shown in Table 5-1.Table 5-1 Fan tray fail LEDs descriptionLED Mark StateSystem LED SYS Steady redSeven-segment LED UnitThe LED displays F for fan failure.Only when the system LED and the seven-segment LED are displayed as steady red and F respectivelydoes it indicate that a fan tray fails.To replace the fan tray, refer to H3C S5810 Series Ethernet Switches Installation Manual for detailedoperation steps.Configuration Terminal FailureAfter the switch is powered on and the system is normal, the booting information will be displayed on theconfiguration terminal. If the configuration system has any faults, there will not be any screen display atthe configuration terminal or the displayed characters will be totally illegible.Troubleshooting when there is no terminal displayIf there is no output information after the configuration is powered on, please check whether:z The power supply is normalz The console cable is properly connectedIf no problems are found after the above-mentioned items have been checked, the cause may lie in theconsole cable or the settings of the terminal (such as hyper terminal) parameters. Please perform thecorresponding check.