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I just noticed on my 750P that the screen emits a very high frequency squeal, and that the frequency can be modulated with the brightness control. I'm not sure if it just started, or that I finally noticed it, or that this new screen (~4 weeks old) makes the sound and the old one didn't. Does anyone else notice this squeal? (Especially 750 vanilla owners) I would estimate the frequency at 19-20kHz. I can try to make a measurement if people are interested. chris schumann schumann@macc.wisc.edu