Currently Being ModeratedMay 16, 2012 10:42 PM (in response to erin169)
1. Have you tried rebooting router?
2. Reset network settings: Settings>General>Reset>Reset Network Settings
3. Have you tried changing the security settings on router e.g. WEP, WPA, WPA2
4. Have you tried changing channel; try channel 1, 6 or 11 (non-overlapping channels)?
5. Reduce the number of walls between your iPad and the router.
6. Have you tried changing wireless protocol e.g. a/b/g/n
Currently Being ModeratedMay 17, 2012 6:18 AM (in response to erin169)
Look at iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
Additional things to try.
Try this first. Turn Off your iPad. Then turn Off (disconnect power cord) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
Go to Settings>Wi-Fi and turn Off. Then while at Settings>Wi-Fi, turn back On and chose a Network.
Change the channel on your wireless router. Instructions at http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
Another thing to try - Go into your router security settings and change from WEP to WPA with AES.
How to Quickly Fix iPad 3 Wi-Fi Reception Problems
If none of the above suggestions work, look at this link.
iPad Wi-Fi Problems: Comprehensive List of Fixes
Fix iPad Wifi Connection and Signal Issues http://www.youtube.com/watch?v=uwWtIG5jUxE
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.