⟐ Commented 8월 28, 2021 at 5:49 GMT-7

⟐ Commented 6월 17, 2021 at 7:07 GMT-7

⟐ Answer edited 8월 28, 2021 at 10:10 GMT-7

⟐ Answer edited 3월 06, 2021 at 10:03 GMT-7

24” Cinema Display - Random Black Screen - Solution

24” Cinema Display, connected to iMac 27” as an external display and it works fine however at random points the screen on the Cinema Display will go black. Checking the screen with a torch I can see the LCD is still on and working as it shows my desktop.

I have hot corners with display sleep turned on so if I move the mouse to the corner the Cinema Display (while already black) properly sleeps, moving the mouse a second later causes the screen to come back on again fully lit.

The time between black screens can be totally random. Sometimes it works for weeks with no problem. Sometimes the black screens return within minutes or even seconds.

Troubleshooting:

Reset PRAM / NVRAM

Reinstall OS - same problem on Sierra, High Sierra and Mojave

Open the Cinema Display and clear out any dust

Reseat all internal cables

None of these fixed the issue. Sometimes they would appear to resolve it but the problem always came back.

⟐ Commented 2월 23, 2021 at 9:13 GMT-7

I just bought Apple LED Cinema Display 24 (A1267) and it has problem with turning on. I have conneted it to my Macbook PRO with Thunderbold Display 27, every display is on seperated USB-C connector.

So the thing is that when I wake up macbook from sleep, LED Cinema 24 blinks really quickly and then goes black. If I use flashlight I can see desktop. After 20-30 attempts from waking up from sleep it’s finally power on. I also made a video what’s going on.

Does anybody have an idea which part needs to be fixed, because any service in my country doesn’t want to accept it on service :(

Video: https://drive.google.com/file/d/1zAWNrsl...

⟐ Answered 2월 03, 2021 at 16:59 GMT-7

Thanks,

Tom

⟐ Answer edited 8월 07, 2020 at 13:38 GMT-7

Then, you need to tease the wall outlet with the display power plug until the display powers up. Apple Genius lady giggled a lot when I told her that with a straight face.

Following advice and posts, I did replace the logic board, and then PSU with known good parts. Display is fine on restarts, not on cold starts. Hot corners off, Pram reset, etc.

I inspected the boards for burnt spot with what I had. An iPhone Macro Lens and an LED magnifying lamp. Nothing burnt.

Display is recognized by two Mac mini’s.

Could this be simply an AC Power Inlet issue and how to check?

Thanks in advance.

⟐ Answer accepted 7월 03, 2020 at 12:36 GMT-7

I disassembled it to see what went wrong. Does someone here see something wrong with these parts? I don’t see it.

I know this will not be a 100% confirm of the problem but hey, maybe you see it!

I also noticed the ‘smudge’ on the backside..

⟐ Commented 6월 22, 2020 at 17:36 GMT-7

I’m only getting a display on this A1267 24’’ Cinema Display when I put the dim setting to the lowest setting.

If I start to increase it by 1% I can see it start flickering.

If I put it really high the display will go off and if I bring the setting all the way back down it does not come back on. I’ve also verified that the speakers are still working when the display turns off, so therefore there is still come kind of power going to the monitor.

The only way for me to turn it back on is to lower the setting all the way back down again, unplug power and replug it back on. However, pretty useless on the super lowest brightness setting.

My question is could this be a power supply, logic board, or all in one cable problem, or is it something else.

Also, there was one time after playing with it for awhile, I was able to bring the screen all the way to it’s brightest setting, I tried putting the computer to sleep and turning it back on and it came back on as normal. I then proceeded to try and unplug the power and replug it back in, the monitor flashed and it did not come back on. I had to adjust the setting back to low, unplug, replug, and it is back on, I’ve since had no luck in getting it back to it’s highest brightness setting.

Please help. Thank you.

⟐ Answered 2월 29, 2020 at 6:25 GMT-7

I got this display on Craigslist for cheap.

When plugging in, it supplies my 2011 MBA power via MagSafe but:

-The panel shows no signs of life

-System Report on the MBA doesn't register any external USB or iSight devices

When opened, the power supply has some residue on the front of the board.

Going through the deep dive for Dead Unit/No Power in Apple's technician PDF:

1. No

2. No, unless somehow the MBA 2011 11" isnt a 'supported system'

3. No voltage on TP11

4. No voltage on TP61

9. No voltage on TP61 or TP13

Conclusion: Replace logic board

So even though there is some residue on the power supply board, there still seems to be issues with the logic board.

When I unplug the 7 pin power connector from the logic board, it has these voltages from left to right, 0 - 7:

1. Nothing: zero volts to anything else

2. Ground

3. 6V to GND

4. 6V to GND

5. 6V to GND

6. 30V to GND

7. 30V to GND

I am left thinking that my Logic Board needs some help..

Please let me know anything else I can post to help with a solution

Thanks,

Timothy

⟐ Answer accepted 10월 22, 2019 at 8:55 GMT-7

⟐ Answer edited 7월 03, 2019 at 12:05 GMT-7

⟐ Answered 6월 18, 2019 at 16:46 GMT-7

Somebody has this problem too.

Vertical lines in 3/4 of the screen, and some ghost images?

++http://imgur.com/CAfM85L++

⟐ Answered 12월 27, 2018 at 11:42 GMT-7

I am measuring between these test points and the LCD screw holes.

Additionally, there isn't any voltage between these contacts on the power supply and the LCD screw holes.

Any suggestions?

Thanks,

Timothy

⟐ Commented 6월 28, 2018 at 10:47 GMT-7

please help me diagnose before i disassemble!

Not Working:

• Blank/Black Screen (1)
• No Audio

1 - (upon connecting mDP, MacBook Screen blinks, but ultimately doesn't detect the ACD)

Working:

• iSight
• USB Hub
• Power Delivery

I heard about re-soildering the LED-strip, but I'm afraid it's panel or LogicBoard. Please advice!

⟐ Commented 2월 04, 2018 at 9:51 GMT-7

I can shine a flashlight on the screen and see the display working, but there's no backlight.

i've checked and re-seated all cables, and I can't find anything fishy other than this VR. it seems to be a little brown around the solders, and the plastic protector on the back of the logic board has melted a bit directly beneath it. the regulator is the center one.

i've run through the apple troubleshooting flowchart, but i don't know where TP81 (test point) is.

thanks in advance

⟐ Commented 1월 20, 2018 at 19:27 GMT-7

One display flickers on for a second, then goes black. The audio and USB hub are working.

The other display does nothing at all. The MacBook doesn't even acknowledge it being unplugged and reconnected.

I have trouble believing that both of these displays suffered different failures at the exact same moment.

Are there common troubleshooting steps after I open them up?

⟐ Commented 8월 08, 2017 at 20:37 GMT-7

⟐ Answer accepted 7월 13, 2017 at 8:05 GMT-7

⟐ Answered 5월 11, 2017 at 20:51 GMT-7