Currently Being ModeratedAug 28, 2012 10:11 PM (in response to SpurtSpanker)
I downloaded the EDID Reset Tool for my 27" Cinema Led Display and the instruction tells me to "Connect LED Cinema Display (27-inch) to begin. However, the display is already connected. I've restarted. I've started without the display connected and then connected it, but I can't get that instruction to go away and the "reset EDID" is pale grey and can't be activated.
Currently Being ModeratedOct 4, 2012 2:37 AM (in response to thomasinfromca)
I had the same problem: "Reset EDID" was inactive/ greyed out.
However i found out that my cinema display usb-cable was not plugged in to my macbook pro. Once i did this, the "reset EDID" button became clickable!
Currently Being ModeratedJun 8, 2013 7:48 PM (in response to SpurtSpanker)
Thank you thank you!
Back in Dec 2011 I had a 27" Cinema Display repaired and this happened. Took it back to the store and they assumed the board was bad. Gave me a new display.
Fast forward to this past week Jun 2013....had the display in to have the LCD replaced because of smudge like marks. Sure enough I get home and same issue....no brightness controls!
I searched and found this thread. Downloaded the tool and voila! Brightness controls back.
Surprised the geniuses don't know about this!