2320 Views 6 Replies Latest reply: Sep 13, 2009 10:22 AM by cesaric
"I ... have noticed a high pitch "whining" sound coming from the top left of the keyboard around the speakers. It is much more noticeable when you put your ear near that area."
Since sound pressure decreases by the square of the distance, I'm not surprised that the opposite is true.
"I've done some extensive research and it appears that this is the CPU making this noise"
The CPU is not located in the area that you described.
"People have also said that when an application is open that uses a lot of processor power, then the sound tends to go away."
Have you found that to be true?
Then where is the Intel Core Duo processor located on these computers? People are saying that the sound is due to the processor switching between power states (thus when it is idle it is a little louder than when the computer is busy). I haven't loaded any CPU intensive applications yet, but I did notice the sound decreased when I had photobooth open.
I've scheduled a meeting with the genius bar at my local Apple store for tomorrow to see what they see. I'm hoping that I can exchange the system for another one since I have yet to install anything on the system and it's only 3 days since my purchase and this issue was present upon first turning on the system.
In the meantime, if anybody has any input I would greatly appreciate it. As i mentioned previously, it appears that this CPU whine noise or capacitor vibration or whatever it is was an issue with the macbooks from 2006 and early 2007, but not really with the unibody aluminum macbooks.
I just purchased a Macbook Pro (3.06 Intel Core 2 Duo, backlit LED display) delivered Sep 4th 2009. I'm running OS X 10.6. I've noticed the whining noise near the upper left side of the keyboard/speaker when I increase my display brightness. There's 16 ticks on the display brightness meter. I was hearing it between the 7 to 15 tick range. At full brightness (16th tick), it went away.
After playing around with the "Energy Saver" settings, I was able to narrow the noise down to the 10-15 tick range. It's pretty annoying because in a quiet room it feels like I have a ringing noise inside my ear like right after leaving a loud concert.
For me it doesn't matter if I have the power chord is plugged in or not. I also disabled the second processor core as a possible fix on some other forums I've read and that had no effect. I can't see this being a fan problem (or sound like one). Sounds like a CPU or resonance issue with the display.
Called Apple Support and they suggested that I take it to an Apple store. It's an hour away for me so I'm not to inclined to make the trip to have someone possibly give me the run around since this could be classified as "unimportant". Anyone have have any luck getting this resolved?