What should I do if the LED of TP-Link router is abnormal?

1. Confirm whether you have enabled LED control function (Not all the wireless router supports this feature)
2. Change another outlet to plug it
3. Hold the reset button/hole to hard reset it according to the Quick Installation Guide.
4. Ensure that it is the original power adapter
5. Change another power adapter

Conclusion: There is still no LED light on, please email TP-Link Technical Support with the model number, serial number, hardware version, and proof of purchase to get a replacement.

https://www.tp-link.com/support/contact-technical-support/#E-mail-Support

Note: There is only one led existed.

1. Change another outlet to plug it
2. Change another USB cable or another USB port
3. Change another power adapter
4. Hold the reset button/hole to hard reset it according to the Quick Installation Guide

Conclusion: There is still no LED light on, please email TP-Link Technical Support with the model number, serial number, hardware version, and proof of purchase to get a replacement.

https://www.tp-link.com/support/contact-technical-support/#E-mail-Support

1. Ensure that there is a device connected to the Ethernet ports
2. Change another Ethernet cable or device
3. Connect the WAN port to one of the Ethernet ports with one cable

Conclusion: The Ethernet led is still off, please email TP-Link Technical Support with the model number, serial number, hardware version, and proof of purchase to get a replacement.

https://www.tp-link.com/support/contact-technical-support/#E-mail-Support

1. Ensure Wi-Fi button/switch is turned on if there is one
2. Login to the web interface to confirm that the wireless function is enabled
3. Hold the reset button/hole to hard reset it according to the Quick Installation Guide

Conclusion: Still the same, please email TP-Link Technical Support with the model number, serial number, hardware version and proof of purchase to get a replacement.

https://www.tp-link.com/support/contact-technical-support/#E-mail-Support

Please refer to What should I do if the internet light is off or there is an error message “ WAN Port Unplugged” on the TP-Link router page?

Note: some specific devices only have one LED light. Like TL-WR940N V6, please check its Quick Installation Guide for more details about its light status.

Please refer to What can I do if my router keeps rebooting itself? to do troubleshooting

Conclusion: If it cannot be fixed, please email TP-Link Technical Support with the model number, serial number, hardware version, and proof of purchase to get a replacement.

https://www.tp-link.com/support/contact-technical-support/#E-mail-Support