I have bought a new Thunderbolt Display and connect it to the 2011 MacBook Air. Both latest Firmware updates has been installed, for the MBA as for the Thunderbolt Display. Each time I play a media with some audio (music or video) and stop, the speakers are emiting a static humming sound for about 30-45 seconds and stop. I can hear the humming sound starting once I star the music or video, but it gets cover by the media playing. Anyone has this problem? My display is still under the 14 days period trial, so I would probably just bring it back and take another one, but as no one as discuss this problem, I want to know if I'm alone or not. ---------- I went back to Apple and have changed the unit. At first nothing. Half a day without any static sound, and then another full day. But at the end of the day, today, 12 hours after having the display open, the speakers made the same static humming sound for 30 seconds after the media had stopped. I wonder if all the units don't have this problem or is it really have something to do with my MacBook Air. For sure I cannot hear any static sound coming from the MBA speakers. It really happen with when it is connected to the Thunderbolt Display. As I said the latest Firmwares are applied, bot MBA and Thunderbolt. I did reset the SMC and PRAM many times with not luck. This is not the fan that I'm hearing. The fan is buy the way in the middle of the computer at the back. Look you will see the grill. Plus if you look at iFixit teardown, you can see it clearly. Please all owners of Thunderbolt display can you make the test and let me know.