Dvdr157 wont play avi or

did you read the manual? reading your manual book will say what kind of format does it plays, many kinds of dvd can't play divx or avi. try to look at the labels that are printed at the front of your dvd player.

I have 2 sony dvd players, 1 can't read divx and avi but the other 1 can. they are different models.

so if you'll buy/purchase any model make sure it does lots. ok?

hope I helped you. have a good day.