@DanHanna 

Thanks for reaching out. I understand that after a power outage at your remote property, your Deco Mesh network came back online (as your Tapo cameras and NAS are accessible), but the Deco app is now showing the error message: "Unable to connect to Deco, make sure the main Deco works well." You have already updated the app, restarted your phone, and tried different networks, but you cannot physically reboot the Deco unit at this time.

This error message means the Deco app cannot establish a remote management connection with your main Deco unit, even though local devices may still have internet access. Sometimes, after a power outage, the Deco unit may not properly re-register with TP-Link's cloud service, which is required for remote management via the app.

Here are some steps you can take or consider:

1) Wait and retry: Sometimes, after a power outage, it may take several minutes for the Deco to fully reconnect to the TP-Link cloud. Tap "Reconnect" in the app and wait a few minutes.

2) App troubleshooting:
• Force close and reopen the Deco app.
• Ensure you are using the latest version of the Deco app (which you have already done).

3) Remote reboot: Unfortunately, if remote management is not working, you will not be able to reboot the Deco remotely through the app. If you have a smart plug or another way to power cycle the main Deco unit remotely, try that. Otherwise, a physical reboot may be required.

4) Additional checks:
• Confirm that the main Deco's LED is solid green (if you have a way to check remotely).
• If you can access the network locally (via a VPN or remote desktop), you might be able to check the Deco's web interface, if supported.

5) Contact TP-Link support: If the issue persists and you cannot reboot the device remotely, please contact TP-Link support. Provide them with:
• The LED status of the main Deco
• Confirmation that the internet is working on the Deco network
• A screenshot of the error message and steps you have tried
• The MAC address of your main Deco and your TP-Link ID (email address)
• Export debug logs from the Deco app (in the app: tap the three lines icon > Support Center > any FAQ > scroll to bottom and tap "No, I need more help" > tap "Email Us" > check "Add System Logs (Optional)" and select "App" > click "Send").

Note: This issue can sometimes occur after power outages due to how the Deco unit reconnects to the cloud. While the local network may work, remote management relies on the cloud connection being fully restored.

If you have any way to remotely power cycle the main Deco, please try that. Otherwise, once someone is able to physically reboot the Deco, the remote management connection should be restored.

  @DanHanna 

Not sure it's a bug more of a design flaw. As for the lack of firmware not even the tp-link staff that monitor these forums have an idea on if/when new firmware is released. 

Best we can do is ask one of the staff if there is a beta version out that you can install but you still wont be able to do that unless you can power cycle the units 

@David-TP 

Pretty sure there isn't another way beside power cycling the units  but still wanted to ask you if you have any ideas? 

  @DanHanna 

Hi, thank you very much for the feedback.

Can you help me find the MAC address of the main Deco X73-DSL?

-You could leave me a message with the MAC address.

Have you tried to delete the Deco APP and download it again? (Deleting the Deco App will not mess with the current network configuration.)

Wait for your reply.

Best regards.