How to verify whether there is a hardware issue of TP-Link Range Extender

1. Confirm whether you have enabled LED control function ( Not all the Range Extender supports this feature)
2. Change another outlet to plug it
3. Hold the reset button/hole to hard reset it according to the QIG

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
3. Change another device

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

1. Ensure wifi button/switch is turned on if there is one
2. Hold  Hold the reset button/hole to hard reset it according to the QIG

Conclusion: Still the same, the range extender may be faulty. 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. Confirm whether you updated the firmware recently or not and how
2. Reset the router by holding the reset button/hole as the QIG
3. Do a firmware recovery if the router supports this feature (You can contact TP-Link technical support to verify it)

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