cinema display recognized, but black with non-working power button

Mine will occaisionally do that as well: turn itself on moments after I have turned it off using the side switch...

I have not changed the power saver settings as my setup is now working (for the most part - minus the symptoms you are referring to.)

SO! In essence I am saying my monitor is behaving the *_same exact way_ without* me changing the power settings as you did!! Weird Huh!?

I'm still thinking it's a software update thing as everyone seems to be experiencing the same thing everywhere at the same time regardless of 'fix it's

This same problem just happened to me. I was working on my computer with both monitors working then the firmware update popped up. I followed the instructions and restarted when it came back on only one monitor is working. Tried unplugging switching the port on the graphics card, and that is not the problem. SO from what I have been reading it seems to be a firmware update issue. Anyway to go back before the firmware update?

The SMC reset doesn't work for me. (I've the same problem).

My screen put around 5 minutes to wake up. And sometimes, the screen scintillates and finish the wake up after touchin some (+/-) buttons.

People who tried with a new Power Brick : did it solve the problem ? For 60$, it could be the best solution for me.... (don't have time to open the Mac every hour :-p)

I started seeing this problem a couple of weeks ago. I have a 23" Cinema display hooked up to a PowerBook G4. Most of the time I use the display with the laptop lid closed. Since this problem started I've had the laptop lid open a bit more and have either used Mirroring or the extended desktop.

I can usually detect the display just fine, but I don't get the options tab all the time letting me select what the power button does. Usually this tab appears just before the display will come on. I've also had the detect display give me the spinning circle and then nothing works and I have to reboot.

At first I thought it was a hardware problem with the power brick. Unplugging and plugging in the power cord to the brick seemed to fix the problems, but now that no longer always works.

If I mirror the displays after a few minutes the Cinema Display magically starts working. If I close the lid the laptop goes to sleep. Hitting the external keyboard wakes it up and sometime I get lucky and the display comes back to life. I had situations where both displays are gone and a hard reboot is the only way to get the laptop display to come back on (even removing the display connector) from the laptop won't wake the display up.

I'm starting to feel it's more of a software issue than a hardware issue. Display works fine when hooked up to a PC.

See my last post. It really did work folks. I had one instance of it happening again, but now I have been working for days without instance. And I work my machines to death - on/off, sleep/wake, bleep/blop...

One thing, ...I am pretty disappointed with Apple over this. My first machine was an Apple I, so I am not about to jump ship, but this issue *****. For every post in this board you can be assured that there are hundreds of people with the same issue.

Next time you visit the Apple store (all of you), take a printout of this thread with you to the Genius who's working.

Mine is failing with my MacBook Pro and my wife's Gateway (XP) so this can't be solely a firmware/mac issue, there is something more fundmental involved because the machine/video card OS are not common across this problem. The monitor/power supply are. I'm going to try the sleep/power saving settngs but again the monitor and power supply are the base commonality in this thread.

For what it's worth my 12 month old 23" Cinema HD Display attached to a Mac Mini 2GHz Intel Core 2 Duo started with this black screen out of sleep just yesterday. I attached an older Samsung 193P to the mini and it works fine. Crazy

I am embarrassed to say that after working fine for five-ish days, I woke my machine up from sleep this morning and I am having the same problem again.

This time I swapped the power supply/cord/module from one 23" to the other 23" and tried repeating the problem with the newer display. Sure enough, now the new display is having the same issue. So I am thinking it is power supply/cord/module like some of you have said.

That is pretty sad considering the cord gets no abuse sitting under my desk. It should last forever. I have an appt. at the Apple Store for Friday. I will report back.

I am having the same problems as most of these people. Power on, Black screen, can't turn off unless i just unplug, sometimes it works other times it doesn't. I brought it into a macstore and it worked fine. Then I brought it home and it worked for a day, then shut down. I do think there is some truth to the recent downloads affecting the operations of the Cinema Display 23" ( maybe the itunes or the recent quicktime upgrade) i installed both just before the problem arised. The question is: is it the power block for the display? is it the display itself? or is it a software problem with the G5 and the Display working together? I need to know cause my warranty plan is almost up! any help would be appreciated!

From the other posts it seems to be affecting not just G5, but Intel, and G4 as well.

For those of you who have the problem and have a second display can you pull up the display options. For the Cinema Display do you get three or four tabs? When it's not working I only get three tabs. When it works, I get a fourth tab which has the options. From this it's almost acting as if the computer is not properly detecting the display. Once the computer has been running a while and getting hotter the display starts to work and the 4th tab appears.

Well I did an experiment and yesterday I unplugged the wires for the Firewire ports and USB hub in the display. I haven't had a problem with the display. I am going to plug them back in and see if the problem comes back, if it comes back I guessing the power adapter is bad. I will report back.

Well I performed my new experiment with some very interesting results. As I mentioned earlier I unplugged the USB hub and Firewire Ports cables and the problem went away. I then plugged both cables back in and the black screen on boot and out of sleep came back. I then unplugged the monitors Firewire cable and the problem went away again. So I figured it had to be the power adapter running right on the edge. I called Apple and spoke to a technician and he said to bring both units in and they would troubleshoot it for free. After hanging up I contemplated taking the units in but had one more experiment to try. See I have an acomdata Mini-Pal external hard drive that has USB and Firewire hubs in it, and I wasn’t about to drag it along as well, so I disconnected the drive from the Mini and Plugged the monitor USB and Firewire cable into the Mini and fired it up and….. all was well; yes the Mini turned on fine and came out of sleep with out a hitch. It seems that one of these Firewire devices is drawing more current than they should or the power adapter is not supplying what it should. I can plug in the external drive or the Fire wire ports on my monitor but NOT both. My bet is on the power adapter. Apple will only sell you one if they have done the troubleshooting for you, but they can be found on the web

I did the same test -- swapped the power block with that of a friend and it's definitely the block. With his power supply the monitor came up instantly and behaves normally.

the big question -- why did all our power blocks fail simultaneously???

I have a PowerBook G4 and 23" cinema display and have never had a problem until I downloaded the recent iTunes update. The cinema display is recognized, but black with non-working power button. I read all the comments and found what works. If I unplug the power adapter from the displays cord (not the power supply that plugs into the wall, but the cord that connect the display to the power adapter) and plug it back in at least two times, the display magically comes to life again. It doesn't happen on the first try, but definitely by the third try...I am not sure if speed between unpluggings and pluggings is a factor, but it seems to make me feel better! Hope this helps! Don't return your display! It is not a display issue...it's an iTunes issue...I am sure of it...

I'm really thinking its a software or firmware issue too. For awhile I did start thinking it was a power adapter issue after seeing people getting new ones and not having a problem anymore. But, I also do the unplugging/plugging in thing and it gets my display to turn on, so if the display turns on. If it was a power adapter issue, I'm pretty sure the display would never turn on regardless of what you do. So I'm thinking that the new power adapters were made after the updates, and are unaffected. For all the people that can get their displays to turn on, I'd say wait it out a little while before buying a new power adapter, wait for new updates or the new OS coming out to see if it will eventually solve itself. And if it doesn't, then I guess we'll all have to fork out the $66 for a new power adapter. Dunno about the rest of you, but I can deal with the annoyance of this problem if it will eventually be solved rather than forking out the cash for a new adapter.