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24" display; Built-in iSight Camera, Microphone, and Speakers; 1920x1200 resolution. Released October 2008, identified by model number A1267.

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Black Screen with Sound

I used to have my Mac Mini (2009 edition) connected to my living room tv. Since we recently upgraded the surround sound, I was wanting to connect it back to my 24" cinema display in the office, but when I connected everything and powered on, I'm not getting any picture. Just a black screen. I've done minor troubleshooting using my Mini and my Air. The mini still connects fine via mini display port to my tv, and my air will transfer sound to the cinema display via the usb. Is there a way to determine if the display port connection on the all-in-one cable to the cinema display is bad? Or at this point am I forced into trial and error with swapping out parts? Please let me know if you have any ideas. Trying not to buy a new display in new parts. >.<

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Hi everybody.

i have the same bug and i looking for a resolution.

I have black screen but with a magnate torch, i see the screen make a very light display.

The sound is ok. USB also.

my mac recognize the screen.

when i plug the monitor, everything is ok for 1sc and after... black screen.

sometinmes, everything are ok for few days.

Have you a idea ?

PS: excuse my bad english, my mother language is french ;)

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i have the same issue

No image but sound only

any help ?

さんによる

replace the backlight LED stripes of the LG panel, you can find them on aliexpress

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For what it's worth I have a similar issue except that its a black screen with sound when I plug in a PC to the cinema display. The way I resolve it is by unplugging the monitor thunderbolt cable from the PC and plugging it into my macbook pro for a brief second. Once the mac registers with the cinema display I can plug it back into the PC and the PC connects just fine. Super odd but works every time.

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We've seen a lot of these displays fail more recently. The issue is, there isn't really a reliable source for the parts of these displays. Apple class all the cinema display models as 'Vintage' now (even the thunderbolt 27" model), so the only option is after market sources, which dry up pretty quickly...

That being said, if you shine a torch on the display and can see a faint image, and the mac can see the external display as being connected (check under the 'Graphics/Display' tap of the system profiler, or system information panel. it should show up showing the display as being connected with its resolution noted, even if the external display is blank)

if that is the case, then it is more likely to be one of 3 things. The LCD having failed, the internal logic board or the PSU. The all in one cable does wear and fail on occasion, but in our experience, this causes intermittent connection issues, so it wouldn't be showing up in the system information panel, and wouldn't be showing a faint image.

Basically, 2 feeds go to the display, so its helpful to know which has failed. You get backlight feed, and you get image. If you can see a faint image, then your backlight feed has failed.

Same goes for your display @schwinny. It is likely that your backlight feed is beginning to fail, so it will need tracing, but its a separate issue to the image feed, which is unaffected from what you've noted in your symptoms.

I hope this helps.

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To clarify, if the image is faint on the display the LCD has gone out? I swapped the logic board with one we bought on eBay but it was untested and we still getting the same results.

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Well I'm not sure if this is the case in apple monitors but in most lcd monitors the first component to go bad is the capacitors in the power supply. This will cause the display to turn on very dim and take several minutes to brighten up or to display black. If you think the monitor is at fault and you have checked your connections thoroughly it might be worth taking it apart to look at the capacitors. If they are bad they will sometimes have a bulge on the top, they should (when working correctly) be perfectly flat. They can go bad without the bulge but this could be a good place to start.

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Hi.

I Have the same issue. Only difference, mine if i switch the power on and of a while, it comes back.

So i guess not the backlight. Is it helps to figure out which one is my issue?

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I have exactly the same problem. Any ideas?

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Same issue. Yesterday the light dimmed. Today the monitor went black. Unplugging everything - and power straight from wall; Have been able to get it back on once--5 minutes and now "black." No icons, no nothing. Have sound and all from mac mini. Its the display.. Why did I pay so much for this junk!

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If you click on the Apple logo => About This Mac => System Report => Graphics/Displays do you see the second monitor listed? If you have the USB cable connected to your other mac, also check out "Audio" in the system report and see if that shows up.

For me, I have the USB communication but not the mini display communication. I found a replacement all in one cable that I plan on swapping in to see if that clears things ups

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same with mine, when i power cycle a few times it comes back. i think its the backlight led driver HV9982 as written in another post Low light or no backlight on LCD

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replaced the complete logic board, same problem, the replaced the backlight LED stripes and all is fine now

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Hi Everyone...

I have a 24" Cinema display and have been experiencing similar issues as described above. Two years ago I took the screen to a repair facility and they told me it was the logic board that was not working properly. The repair would have cost around $300 dollars... it was just not worth it. I took the screen home with the intention of recycling it but never got to it. The screen stood around 2 years not being connected to power supply. Today I thought I would get rid of it but before I did so I wanted to try turning it on one more time... Connecting it while macOS is running the same problem persists. Screen flickers for half a second (I see my desktop image) and then goes black. Unplugging and re-plugging did not help either. I wanted to try one more thing though and that was seeing if there is any change when my macbook pro is running Windows via bootcamp... And alas! Starting windows, the screen not only flickers for a millisecond but for about 5 seconds and then turns on completely normal... I am writing this connected to the screen and it works fine. I have not rebooted through macOS yet but will try that today. Would be interesting to see if some of you are having the same findings.

Nick

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Also works with macOS... this is weird!

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Hi Nick, when it worked with macOS, did it stay on for a few hours. Like other posts, most of the time, my display flickers once (a millisecond) when I turn the power on. 1 in about 50 times it comes on for a few hours, but then suddenly no picture. One time, I just left it plugged to my MacBook with no picture, and it came on suddenly. I tried Shift, Ctrl, Cmd + power button whilst rebooting, the screen flashes again for a millisecond and again no picture. Sound, USB and even the display's power cable via MacBook work. It's very frustrating, when it does because it's fantastic... Is there an adapter to connect the magsafe square plug to VGA and connect to a PC? Thanks

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Dwight さん、ありがとうございました!
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