LogFAQs > #967693238

are devices that have no internet getting dynamic IPs?

no -> configure DHCP on the router and make sure the devices are requesting dynamic addresses. DHCP could be full though that seems unlikely at a residential location. maybe if your wifi was unsecured and every mobile device in the area was grabbing an address, but seems unlikey.

yes ->
maybe a firewall issue? I wouldn't expect it to be. I would want to try pinging some internet addresses.
maybe DNS? make sure DHCP is providing correct DNS addresses. if you ping google.com it should be able to resolve to an address for example.

main thing will be to look in the router configuration and see what's going on as well as check configuration on clients that aren't working and try pinging from them. (not as easy to diagnose when the device is something like a TV and not a PC.)