Doesn't detect my router, or even my other Apple devices (a MacBook Air and an iPhone 6+): any way to confirm diagnosis? (I found the Diagnostics data under About under General Settings--didn't see anything directly implicating my modem, but the file was huge, w/ lots of extraneous thread reports, so I didn't scan the whole thing--too bad there's no way to search it--would that kind of info be near the bottom of such a file?)
Hello and welcome to the forum!
Please provide some further information: 1) iPad model (assume an iPad 2 from the sub-forum posted); 2) iOS installed (be specific - current one is 8.3); 3) Do your other devices work w/ your router; 4) Have you recently upgraded or updated the iPad's iOS, and if so from what version; and 5) Have you 'Reset' the device? The last item requires holding down the ON-OFF & HOME buttons simultaneously until the Apple logo appears and the iPad reboots.
But for starters if the reset is of no help, you might want to go into your Wi-Fi settings, click on the network that is active (assume your home network's SSID), and then pick 'Forget This Network' - have the iPad rescan for near Wi-Fi networks and re-connect. Finally, if unsuccessful, does your iPad connect to other Wi-Fi networks, such as at a Wi-Fi hotspot (e.g. Starbucks, restaurants, etc.)? Dave
P.S. for clarity, your iPad does not have a modem, but 'radios', one for Wi-Fi, another for Bluetooth, and possibly a cellular one if that was your purchase option.