Hi, I recently got my TBD back from Apple after they replaced the logic board. However, on Tuesday I noticed that it is very dim. It wasn't being like this last week. I've attached a picture - both displays are on 100% brightness. Bearing in mind that the Thunderbolt Display is actually meant to be much brighter than the MBP on paper. Tried turning off/on - no luck. Looks like another trip to the Apple Store then! Thought I'd quickly check with MR first though, they may have some pearls of wisdom I have missed out on Thanks.