Currently Being ModeratedDec 3, 2012 8:32 AM (in response to David Snowdon)
Did you ever get a resolution to this? I came home from a trip during which I upgraded Mac OS X and now I have a useless Thunderbolt display.
Currently Being ModeratedDec 4, 2012 12:17 AM (in response to aeleenf)
After many hours fiddling with the macbook to no avail, I took the TB display down to the Apple store, where they swapped it for a new one, which fixed the problem. Looks like it was a faulty thunderbolt display which they replaced under warranty. Great service from the Apple store there. Was in and out in 15 mins. Top marks.