Kev said:
The link is just fine. It's the latest firmware update for TB displays specifically addressing fan issues and I've seen it fix at least one noisy display.
Of course if the update doesn't do anything then it's time to talk to Apple, and if they start giving you the run-around just ask to speak with an Apple certified technician. This has helped me in the past. But either way the fans shouldn't be running if your system is shut down or asleep so it's something to be addressed, either with a fix or a replaced display.