Hey everyone, My 17" MBP emits a fairly high-pitched whine whose intensity varies with the brightness of the display (thus why I attribute the noise to the display). When the display is off or with a brightness of up to 50%, no high-pitched whine is emitted. From one bar above middle to two bars from full brightness though, a high-pitched sound can be heard in a silent room. And finally at one bar from full, and at full brightness, the MBP is perfectly silent. The sound is most audible (and most annoying!) at roughly bars 10-12 out of the 16 bars. So I'd just like to ask all you 17" MBP owners whether yours exhibits this as well. While my 17" MBP is the June 09 Core 2 Duo model, the panel it uses seems to be used in the new Core i5 + i7 refresh as well. So I'm curious if the display or something else has changed enough and whether the whine persists. Typing the following into the Terminal app will give you the model of the LCD you have: ioreg -lw0 | grep IODisplayEDID | sed "/[^<]*</s///" | xxd -p -r | strings -6 Mine is the LTN170CT10. So please, post whether you have this display whine and post your LCD model. You MUST be in a near dead-silent area to be able to hear this whine if it exists.