Installation ManualH3C S7500 Series Ethernet Switches Chapter 8 Troubleshooting8-2–Stop bits: 1–Flow control: None–Terminal emulation mode: VT100z Something is wrong with the console cable.8.1.2 Illegible Characters on the TerminalIf the configuration terminal displays illegible characters, it is very likely that the terminalparameters are incorrect. In this case, check them according to the correctconfiguration listed in section 8.1.1 “No Display on the Terminal” on page 8-1.8.2 Troubleshooting the Power SupplyTable 8-1 Description of power LEDsLED Status DescriptionON The power module works normally.OK (Green)OFF The power module is faulty or is not installed.ON The power module is faulty.FAIL (Red)OFF The power module works normal or is not installed.Note:If the FAIL LED on the S7503 is on, it is also possible that the power module is inposition but the power switch is not turned on.If the OK LED is off, something is wrong with the system power supply. Check whether:z The power switch is turned on.z The power cable(s) is properly connected.z The voltage is correct.8.3 Troubleshooting the Fan TrayTable 8-2 Description of fan tray LEDsLED Status DescriptionON The fan tray works normally.OK (Green)OFF The fan tray is faulty or is not installed yet.
