Starting yesterday evening, the deco system we have in place stopped working reliably. I went through all the troubleshooting steps I could find, including resetting all the units and setting up a new network, and this morning it's still unreliable. 
 

we have a system with four M5 units, one main that's wired to the router and three satellite units. The internet dropout appears to be starting from the main unit. 
 

the firmware was up to date the last time I was able to connect to the system last night.