Devices no longer can connect to network

Devices (phones, iPads, smart TV) no longer can connect to home network.  The network is visible on the devices, but the password won't authenticate. I can get my laptop to access the network by plugging directly into the router. Everything looks normal on the router (i.e., all the correct lights are lit). Both modem (cable) and router have been unplugged and replugged. I downloaded the most recent firmware for the router. Still no success. Any ideas?