My laptops cant get connected eventhough my router is available

just overnight this problem occured out of the blue.My usr 8054 is still on and functioning i can watch tv over he internet on tv via my box router is active can see it on wireless network list but cant get conected.Both my laptops cant get connected anymore the error msg is connection failed.I dont know what to do would apprecite yr help.Tried to turned it on/off nothing seems to work.