v1.0
9 / 10
Troubleshooting
Hardware Fault Analysis
Power and cooling systems—power and fan
Port, cable and connection—ports on the front panel of the switch and the cables connecting these ports
Faults Relative with Power and Cooling System
Do the following checkups to help remove the fault:
1. When the power on-off is at the “ON” location, check whether the fan works normally. If the fan does not work well, check the fan.
2. If the switch is too hot, check whether the air outlet and air inlet are clean and then do relative operations in section 2.3
“Requirements for Common Locations”.
3. If the switch cannot be started and the PWR indicator is off, check the power.
Faults Relative with Port, Cable and Connection
Do the following checkups to help remove the fault:
If the port of the switch cannot be linked, check whether the cable is correctly connected and whether the peer connection is normal.
If the power on-off is at the “ON” location, check the power source and the power cable.
If the CLI port does not work after the system is started up, check whether the CLI port is set to a baud rate of 9600 bps, eight data bits,
no sum check bit, one stop bit and no traffic control.
