Blue light = ready to join mode. So its not part of the deco mesh. Use the deco app to add the device back into the mesh

@KnutErik You can reset it back to factory defaults by pressing the recessed reset button at the bottom. Then you can set it up as a new deco with another account.

@arktiknova Im not worrying too much as this stage, waiting for more info from TP-link, Here in France on the tp-link site, the X20-DSL is announced as "coming soon" so there may be life in the...

@Oakmeister Yes this! I have 3 deco x75, 3 M5s that all support the new firmware features that I desperately need (like being able to restrict clients to a certain preferred deco!). Unfortunately my...

@MarkusMarkus In the deco app if you go into More > Internet at the bottom you can see the values for RSRP RSRQ and SNR, you need to get these values as low as possible, after you have moved the...

@PMLV Are they all wireless or some of them via ethernet? I've seen issues with ethernet clients not showing, I had this on the x20-4g until they updated the firmware in Febuary.