Magnavox tv/reprogramming channels

Please help...we used our tv for an anniversary party so we could play a dvd during the party.

Our tv is a cable ready Magnavox.

When we were back home hooking the tv/vcr/dvd player back in we could not get the channels on the tv to come back in.

Now the screen has  x 69 in the upperleft hand corner and we can not auto program the channnels back in.

Do we need to have a code to reset the channels? We do not have cable hook-up. We get only the three local channels.

We would appreciate your help/suggestions in this matter.