sony scd9000es picture problem

Has anyone encountered a wavy flutter on the top of the picture with this DVD? It is a new problem, and I am not sure whether it is dirty dvd's or electricity problems or just a bug in the player. The picture is fine except that the top literally "shimmies" on part of the picture. Any thoughts would be helpful
Do you have a speaker on top of your monitor (T.V.)? If so, this could cause the "waves" you describe. Try a shielded speaker to cure the problem.
If you are watching a movie on a 4:3 TV and you have the DVD player set on 16:9, This will cause the wavy flutter top of the picture.

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