TP-Link RE350 AC1200 Manual page 25

The extender is connected to the router unnormally. Maybe the
●
gateway is set incorrectly in the Static IP. You can select "Obtain an IP
address automatically" on the "LAN Settings" page.
Instructions for the icons of 2.4GHz/5GHz wireless status:
Name Instructions
The wireless is on and encrypted.
The wireless is on and unencrypted.
Router：The wireless is off, or the
connection is failed.
/
Extender：The wireless is off.
The icons are selected.
/
Launch a web browser and type in http://tplinkrepeater.net, and then go
to Settings > Status webpage.
Click the icon of your router, the extender or clients. The detailed
instructions for the corresponding icon are displayed below.
View the Information of the Extender