Q: Won't accept network password

What network security are you using on the router?

Recommended settings for Wi-Fi routers and access points - Apple Support

Have you powered off and then back on your router?

Did you power off and and then back on your router?

Does the iPod NOW connect to other networks? If yes that tends to indicate a problem with your network.

Does the iOS device see the network?

Any error messages?

Do other devices now connect?

Did the iOS device connect before? yes but before erasing

Try the following to rule out a software problem:                

- Reset the iOS device. Nothing will be lost

Reset iOS device: Hold down the On/Off button and the Home button at the same time for at

least ten seconds, until the Apple logo appears.

- Power off and then back on your router

.- Reset network settings: Settings>General>Reset>Reset Network Settings

- If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network

https://support.apple.com/en-us/HT204051

- iOS: Recommended settings for Wi-Fi routers and access points

https://support.apple.com/en-us/HT202068 You do not know

- Restore from backup. See:

iOS: How to back up

https://support.apple.com/en-us/HT204184

- Restore to factory settings/new iOS device.

If still problem and it does not connect to any networks make an appointment at the Genius Bar of an Apple store since it appears you have a hardware problem.

Apple Retail Store - Genius Bar

https://www.apple.com/retail/geniusbar/