Now my TV can't see it anymore.

What do I do, to change it back to NTSC?

BTW DVD player is TruTech TT320, how do I reset this?

I did that once on my Denon 3910. I had to look in the manual at the menu tree, and then I just calculated the number of key strokes it would take to get to that part of the menu to switch it back to the proper setting. However, there may be an easier way that somebody knows about.

If you seach through the manual, they usually have instructions in there (sometimes hard to find, look thoroughly) for changing the player back or to reset the player so that it will default back to NTSC. If you can't find it in the manual, then call the service number in the manual to see if a CSR for TruTech can help you. You can also try what Perch33 has already suggested.

That happened to me one time and I had the dvd player hooked up via component video,
Now in pal s-video is the standard so if you hook up your dvd player with an s-video cable you wil see a picture on your tv even though it might be distorted you will be able to switch it back over...

I hooked it up to Composite... and saw distorted but enough to fix it. Thanks :)