@David-TP 

Hi,

thanks for a quick reply. No errors has been showned in app before or after update to the newest firmware.

There is no switch between Deco X50-PoE and internet. One of the X50-PoE is set to "Main". And thats the one closest to the incomming cable for internet, but it is the one furtherst away in the house. 
 

When I'm standing in the garage it works fine to connect to the guest network but when i'm in the house it just trying to connect till it times out. But to connect to main network is working fine wherever in the house...

Model Deco: X50-PoE AX3000

  @David-TP 

Sorry, I forgot about the switch between the main X50-POE and the other two. There is a switch called (Ubiquiti-Unifi 16 PoE) witch power the other two X50-PoE with PoE. So they are not powered by DC outlet.

  @MartinNilsson 

Hello , 

 I have really same case as here in this thread is described. Just the middle switch is tplink 8 port fast ethernet. Could I ask you if there is some solution?

Thank you

Gargy

  @Gargy 

There was a very simple solution to my problem. I only had to change the settings on the switch by enable and allowing the guest network.