QuickTime White screen / Freeze only on .wmv saved as .mov

I had a normal habit of downloading .wmv files, playing them and then saving them as .mov files using QuickTime Pro. Since the QuickTime 7.1.6 release I have been doing the same practice without any problems. I still download (.wmv), play and save as .mov files. Works fine... Recently I went back to play one of my pre-QT 7.1.6 .mov files and all that I got was a white screen, no audio and after the timeline moved for a few seconds, QuickTime froze. Had to force quit. Nothing else has changed except for applying the update and now none of my pre-QT 7.1.6 files that I had saved in this manner will play. Any ideas...
G4 dual 1.25 mirrored Mac OS X (10.4.9)

A few suggestions:
KB article - No sound from some applications, but system alert sounds play (Mac OS X 10.3, 10.4)
Another trick: If you have GarageBand installed, open it (maybe open a GarageBand document) and then quit out of the application.
Make sure you have the latest version of Flip4Mac.

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Welcome to Apple Discussions
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To be honest you have serious problem and I really do not believe you can solve it alone. It is not easy to say for sure why white display occurs at the boot up. In my opinion there can be several reasons responsible for this.
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The best thing you can do is to contact authorized service provider. Let them check your notebook. They have special tools and there is no problem to find out why this happen.
Bye

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Smithy1783 wrote:
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QuickTime White screen / Freeze only on .wmv saved as .mov

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