I have a MiniDP 27” Cinema Display that I use with my MBP and it recently starting not working. When I first connect the MBP, it will generally work, but after closing the lid, the Cinema Display goes black. If I disconnect/reconnect the MiniDP, the MBP screen flashes as it sees the condition, but the Cinema display remains black. If I disconnect the power from the display and try again in an hour or so, the same thing happens. I’ve also now noticed a blue line running down the right edge of the monitor on black screens.