Wi-Fi works on computer, but not other devices?

When I go onto the CPU, Wi-Fi works normally. But when I try using an iPhone 5 and an iPad 2 (both have ios 7+), it won't connect to our home Wi-Fi network. We can tell that Wi-Fi connection is still possible, because our neighbors' Wi-Fi networks show up. Except ours. Why?

You should probably check out your broadband device or wireless device. If you still have a warranty, you could take it to see if there's a problem.