I have a Wi-Fi network that seems to be giving me trouble with some Android devices. Windows PCs, Macs and iPads all connect to it, but two Android devices have become unable to connect, although they did before.

The Wi-Fi router is a Netgear N600 broadcasting the same service set identifier (SSID) name on both 5 GHz (channel 44) and 2.4 GHz (channel 7) with Wi-Fi Protected Access 2-Pre-Shared Key (WPA2-PSK) [Advanced Encryption Standard] security. The Android devices are a Huawei MediaPad running Android 3.2, and an Asus Transformer Prime TF201 running Android 4.0.3.

Any tips for Android troubleshooting?