The Apple 24 inch LED Cinema display and the Apple thunderbolt display have been a source of frustration for many people. They flickers, go black, the screens gets garbage on them, the fans turn on and off. After reading lots of forums and trying various things I have practically completely eliminated all the flickering on my 24 inch LED Cinema display, here is how.
I am running a Mac Mini and one of these Apple LED cinema displays:
It’s had a problem with flickering ever since I first got it back in 2009. It started off that once a day or so it just went black for five seconds. At other times the screen is completely filled with gobbledygook until I sleep the display and restart it. At other times the screen just flickers black for a fraction of a second, but all the fans in the screen power down and then power up again. Apple have released various ‘fixes’ to the problem over the years which have never fully resolved the problem. Phone calls to Apple support were of no use after the first year because they just claimed it was a hardware problem and ‘out of warranty.’ The flickering got extremely bad recently with ‘El Capitan’ and the flickering also got worse when I connected a Pegasus Thunderbolt hard drive.
It’s not just the Apple LED Cinema display that has been affected. Even Apple’s latest ‘stunning’ Thunderbolt Displays have problems too. The Apple help forums are riddled with complaints…
Apple have released various ‘fixes’ over the years which don’t seem to work:
Firstly, don’t buy any kind of Apple thunderbolt display!
But if you already have one, here are a few things that might help.
Crazy as it sounds, wrapping my thunderbolt cable in aluminium foil was the biggest help of anything. I looped up the excess thunderbolt cable into a circle and put aluminium foil around it to shield it.
Here I have activated the bottom left hot corner so that it puts the display to sleep. When things get really bad I can put the display to sleep with my mouse without having to see what’s happening on the screen. Then I can wake it up again with my spacebar and more often than not the problem has fixed itself temporarily.
All the best and let me know if anything works!