Suddenly devices can't connect to home wifi

Have never had a problem with connecting to home wifi. Came home one day and my iPhone said it couldn't connect, nor my sons iPod and iPad, nor my husbands samsung phone, nor our PC. The android products say "authentication problem occurred." Our laptop is fine.

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More about suddenly devices connect home wifi
  1. Remove the power chord from your wireless router for about 30 seconds, and plug it back in.
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