I've recently bought Deco M5 for my home. They worked perfectly fine for almost 20 days.

Suddenly they stopped working. I've done a factory reset and tried to setup them again . But now they wouldn't want to connect to internet

I see redlight on them.   

I tried to connecting my laptop to same cable that connected deco m5 to my router i see i get internet but Deco never gets internet.

I've spent almost an hour trying multiple things to no avail