I have been a happy user of 3 units of M9 plus for last 13 months.
One of them now refuses to connect, with red light blinking. "Disconnected from other Decos".
The back-haul is not even wireless, but ethernet.
Tried resetting/rebooting multiple times, but did not work.
Tried disconnect the ethernet and put it close to other deco; it appeared to work for 10 sec (green light) then disconnected again.
I sent a message to tp-link, expecting them to replace this bad unit under 2-year warranty.
Is there any possible fix I can try?