QT not playing sound for MPEG1 files on my Intel Mac

My QT Pro (latest version, automatically updated regularly) on my new Intel iMac will play the video of MPEG1 files, but no longer plays their audio. The same MPEG1 files play fine on my "Wintel" machine at work using QT for Windows 7.0.4 (the non-Pro version). QT still plays AVI and MOVs fine. Is there a known bug with the Intel version of QT?
The last time I played an MPEG with no problems was on my older G4 Mac, just before purchasing the Intel Mac one month ago. I performed the software migration from old to new Mac using the Apple's Migration Assistant, then Software Update fetched and installed the newest version of QT. I haven't tried reinstalling an older version of QT yet. I was hoping to find some insight here before doing so.

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IPOD will not play sound for the videos that i download i can see video

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Thanks!

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it's a hardware issue read more about it here
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more hits
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Hello!!
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Regards
Carlos Eduardo

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I withdraw this question. It's in:
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Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom to say “Thanks” for helping!

My iPad will not play sounds on certain applications. ie: if I click on a video from FB sound will not play. If I go to YouTube and play the same video sound will play. Also certain games will no longer play sounds. They always played sounds but now won't

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http://support.apple.com/kb/HT4085

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You have a dead phone. Call one of the numbers on
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