Hi, I have a Penryn 17" MacBook Pro (2.5Ghz) with the Hi-Res Glossy LED display, the display is great, no dead pixels or any yellowing, however a high pitched noise is emitted from the lower right corner, approximately where the backspace key is. Depending on the brightness the noise varies, going away when the backlight is disabled. As soon as the backlight is active the noise is there, turning to full brightness won't make it go away. Other users have reported similar problems when using Win XP or Vista in combination with Boot Camp. However, I have this noise when using Mac OS X (no Boot Camp installed so I can't check whether it's there as well). The noise is not really loud, but you can hear it clearly when putting your ear close to the backspace key. In a silent room you can hear it when sitting in front of the MacBook Pro. If you move the slider for the brightness it becomes more apparent as you can hear it change its frequency, especially when moving the slider to the far left (thus turning the backlight off), you will notice how the noise suddenly goes away. Are there any other MacBook Pro owners with similar configurations which can hear the same noise? Or is my MacBook Pro faulty? What makes we wonder is what actually is causing this noise, since the LED backlight shouldn't have an inverter which would cause this noise, unlike a CCFL powered backlight.