I needed to change my comcast email password from my desktop but now I'm having a problem sending emails from my iPad. From what screen on iPad do I need to enter the new password?

I can't even connect to Comcast from the internet on iPad, it freezes.

This is likely to be the root of the problem. Are you doing this from Safari?

What can you do on the iPad? Can you surf the web? See apple's site. See comcast's site?

If you are having problems with apps stalling or crashing,

-- double click on home button

-- swipe up on all the apps to force quit them

Re-boot ipad.

Press and hold the Sleep/Wake button until a red slider appears, then drag the slider. Then press and hold the Sleep/Wake button until the Apple logo appears.

https://support.apple.com/en-us/HT201559

force power down if the above give you trouble.

Hold down both the Sleep/Wake button and the Home button. Ten seconds or more. Hold until the Apple logo appears.

more details on re-booting:

You would need to go to Settings>Mail, click on the Comcast account, then at the bottom of that screen you should see an option to "Delete" the account (or possibly it will say "Sign Out"). Click on that, then add the account back in using the App-specific password to sign in.

Cheers,

GB

So, you typed in the App-specific password and not your Apple ID password?

Did you completely close the app before trying again with that password - double click the Home key and swipe up on the thumbnail.

If so, I would suggest that you reset it: Hold down the Home and Power buttons at the same time and continue to hold them both down until the Apple appears (up to 30 seconds). Once the Lock screen displays, try it again.

GB