@luckystrikes Going to assume the Mikrotik is your modem. Can you provide the model number? The two deco's ignoring the Ethernet cable are they the AX50 and slave decos? If yes see if this post helps...

@Vassilis Thanks for reaching out. I understand that you have been using the Speed Limit feature on your Deco Mesh system to restrict upload bandwidth for certain devices, but recently it seems that...

@mark213a I agree it needs to be fixed but we have at least a confirmed work around for the issue if it comes up again until the engineers get around to fixing it. Since I do not work for tp-link I...

@mjp79 Thanks for reaching out. I understand you are trying to reconfigure your Deco Mesh system (including XE75 Pro and M5 units) for a new FTTH connection with Plusnet, which requires switching...

@Kmcs I understand that after a recent outage, your Deco Mesh system is not connecting to the internet, and the units are stuck on a solid yellow light. The Deco app shows that the units are...

@mark213a Can you try the following and see if it helps? Please report back. https://community.tp-link.com/en/home/forum/topic/844516?replyId=1621622