If you're wondering what's wrong with your TP-Link Deco flashing blue light, don't worry. A blinking blue LED often indicates your Deco device is set for installation or is waiting to link to the network. In some circumstances, it can also show itself following a Deco reset or should the device has lost its prior setup.

Common Reasons for TP-Link Deco Flashing Blue

• New Device Setup: The Deco app lets New Deco units flash blue while they wait to be set up.

• Deco Reset: After a Deco reset, the device goes back to factory settings and flashes blue until it is configured once more.

• Configuration Removed: The Deco will go into setup mode if the current network settings are deleted.

• Start Not Done: An installation procedure that is interrupted will leave the device flashing blue till start is complete.

Easy Fixes

1. Finish the Setup

• Start the TP-Link Deco app.
• Follow the instructions on the screen to connect or add the Deco device.

2. Check Connectivity

• Verify the modem is connected to the primary Deco unit and switched on.
• Make sure all Ethernet connections are correctly attached.

3. Reset the Deco

• Disconnect the Deco for thirty seconds.
• Reconnect it and give it a few minutes.

4. Do a Deco Reset (Should It Be Necessary)

• Press and hold the Reset button for ten seconds.
• When the LED changes, release the button.
• Using the Deco app, arrange Deco once again.

Finally

Usually, a flashing blue light on a TP-Link Deco means the device is ready for setup or has been reset. Most of the time, checking your connections or finishing the setup with the Deco app helps to fix the problem fast. If the light keeps flashing after installation, think about changing the firmware or getting in touch with TP-Link support for more help.