Some devices can connect to the wifi, others cannot

I attempted to reset my modem last night due to a security email I received from work about wireless internet modems being at risk.  When the modem came back online, only about half the devices in my house could connect.  2 of the 4 iphones could connect.  playstation cannot connect, etc.  

I unplugged it again and waiting for about 60 seconds and attempted to boot it back up.  this has always worked in the past.  now I cannot get all of our devices online.

Comcast ran a scan from their end and said everything looked good.  

what else can I check/do?