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Philips widescreen flat TV model #50PF9966-37 50" plasma, as the tv warms up a loud hissing sounds comes from the back. The hissing sound does not go away when you mute the broadcast sound. when you change the channel the hissing goes away for a second until the picture comes back. Also, when i turn on the ambilight while the tv is still muted i hear another high pitch sound. Please help it is driving my wife crazy.

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From what I'm seeing online, the bulbs in the Ambilight may be the culprit. I also read that a firmware upgrade could fix the issue too. There was also a recall of some TV's with that issue, so I would check with Philips about your model and serial number and see if your TV was included in the recall. If you raise enough cain and threaten to never buy from them again, they may get your set fixed for you... even if the warranty is up!

Good luck and please post feedback!

Posted on Oct 10, 2010

Testimonial: "Thanks for the help. I will be calling customer service Monday morning. I will update after the call. Thanks again...."

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