Chosen Solution
Greetings, I am looking for some help with my 6-year old ACD. It works for about 2-3 seconds when turned on, then flickers and dies. This happens regardless of whether it is plugged into my MacBook or Mac Mini. Using a flashlight, I can still see my desktop on the screen, but it is extremely dark. The other features (MagSafe charger, speakers & iSight) are all working fine. Going through the questions here, this seems like a pretty common problem, however the answers are conflicting and confusing - some people say the logic board is toast, others say the backlight is dead, and I’ve even read something about the backlight being part of the logic board (what??) which is faulty. Can somebody please confirm exactly what is wrong, and the replacement part I’d need to buy? Your help would be greatly appreciated. Regards
Hi , I bought an old 24” Cinema Display and it started to having this problem too. When I plug in the display port screen flickers for like a 2 or 3 times and dies off. Speakers and USB ports are working without any problems. Tried everything and none of the solutions worked for me. And I do not have the opportunity to go and replace backlight. So what I figure out is doing this appears to fix the issue! Plug your mini display port and usb cable,You will not see any image(obviously) set the Display’s brightness to the lowest as possible,Plug out both usb and display port,Plug only display port/after this screen will start to flicker like crazy,Put your MacBook, Mac Mini … etc. to sleep mode, Wake up your system and you are good to go! At least this is working for now for me. Set brightness again to what you want it should be OK now. I know this is an old thread but maybe someone who has this will see and maybe it will work. Regards.
Thank you so much @ccain123 ! Yes, I did end up ordering a fairly new display from AliExpress, which arrived in a week. Thankfully, my display works exceptionally now! Paying a little over $100 seems way better than spending $1599 for the new studio display which has the same basic features, even though I hesitated myself at first also in fixing this “old” unit. I hope it lasts another decade, God-Willing! I highly recommend anyone else to also just fix the unit by replacing the LCD.
It probably is because the drive circuit is broken. Try bringing it to an Apple Store UPDATE: People say it happens when things are plugged in to the display like flash drives(to me it sounded silly) and people also said you should try shielding it with tin foil. That interference affects it. Anyway if this doesn’t help i’m still looking things up. UPDATE: I found that it also could be a cold solder joint on the logic board, on the backlight driver or that the driver itself is broken. Maybe reflow soldering might help?
Hello All, this also has been happening to me where the monitor just flickers starting at 20% brightness. Anything lower seems to be fine, but it is too dim. So I just recently ordered a used/working logic board and replaced it on my unit. Unfortunately, it is still happening. I doubt it is the logic board, since it is happening on 2 different logic boards. Does anyone have any other suggestions on what it could be? Thanks so much.
