Appendix A Troubleshooting - TP-Link T3700G-52TQ Installation Manual

Appendix A Troubleshooting

Q1. What should I do if I forget the username and password for the switch?
1. Connect the console port of the PC to the console port of the switch and open a terminal emulation
program.
2. Power off and restart the switch. Perform the action indicated by the terminal emulation program to
reach the bootUtil menu. The action differs from product to product. Possible actions are listed below:
• Press any key to stop autoboot.
• Press CTRL-B to reach the bootUtil menu.
3. The bootUtil menu is shown in the following figure.
4. Select the "Reset" option to restore all the configurations to factory defaults. The default login username
and password are both admin.
Q2. Why does the PWR LED work abnormally?
The PWR LED should be lit up when the power system works normally. If the PWR LED worked abnormally,
please take the following steps:
1. Make sure that the power cable is connected properly, and the power contact is normal.
2. Make sure the voltage of the power supply meets the requirement of the input voltage of the switch.
Q3. What should I do if I cannot access the web management page?
Please try the following:
1. Check every port LED on the switch and make sure the Ethernet cable is connected properly.
2. Try another port on the switch and make sure the Ethernet cable is suitable and works normally.
3. Power off the switch and, after a while, power it on again.
4. Make sure the IP address of your PC is set within the subnet of the switch.
5. If you still cannot access the configuration page, please restore the switch to its factory defaults. Then
the IP address of your PC should be set as 192.168.0.x ("x" is any number from 2 to 254) and Subnet
Mask as 255.255.255.0.
Q4. Why is the terminal emulation program not displaying correctly?
Please try the following:
1. Make sure the power supply is normal and the console cable is properly connected.
2. Check if the console cable is the right type.
3. Ensure the parameters of the terminal emulation program are correct: configure Bits per second as
38400, Data bits as 8, Parity as None, Stop bits as 1, and Flow control as None.
JetStream Stackable L3 Managed Switch
Appendix A Troubleshooting 27