Second screen stays black Mac Pro

second screen stays black Mac Pro with 2 x 30" apple cinema HD displays, connected via thunderbolt / USB adapter

I ma confused. You say yo have Lion and are using "via thunderbolt / USB adapter"
Only the 2103 Mac Pro has Thunderbolt and it shipped with Mavericks
What model Mac Pro?
What video card(s)?
Does the one screen work if the the working one is disconnected?

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My macbook pro will turn on but screen stays black.

My macbook pro will turn on but screen stays black. There is no sound on start up and keys dont light up. I have done all the resets:
I disconnected the computer from the power cord, and from all other cables.
I held down the power button for several seconds to turn off the computer.
I let it sit 5 minutes.
I restarted the laptop while holding down the Shift key and nothing happened.
Holding down Command, Option, P, and R to reset your PRAM and NVRAM
http://support.apple.com/kb/ht1379The only thing I haven’t tried is “floating” the computer. I’m not ready to heat it up to the melting point.
I need lots of help!!! any ideas? Its a MacBook Pro 15” or 17.5” about 5 years old. Its about 2 updates behind (OS: Snow Leopard)

Zane W is giving you good advice. Take it to an Apple store genius bar and have them examine it for free. You then will know what the issues are and then can make informed decisions.
Ciao.

My macbook pro doesn't turn on. The battery is charged but the screen stays black when I press the power button. Anybody has a solution for me please?

My macbook pro doesn't turn on. The battery is charged but the screen stays black when I press the power button. Anybody has a solution for me please?

Try a #1 SMC Reset and see the Apple links, if that doesn't work make a appointment for a evaluation.
..Step by Step to fix your Mac

Macbook Pro 2008. My screen stayed black and is unresponsive.

Macbook Pro 2008. My screen stayed black and is unresponsive and sleep light is on. I shut down and then restarted and nothing happened on screen but sleep light came on and is solid.

It could possibly be the video card, or the logic board. You could try a smc reset if you have not done s yet. smc reset:
http://support.apple.com/kb/HT3964
I had an issue similar to this, and there was a bad logic board, hard drive and video card.
You might want to bring it in to the Apple store, they do the diagnostic for free and give you a repair price.
They offer a flat repair rate, which they fix what ever is wrong as long it was due to liquid damage.
The repair cost me about 1/3rd the price of a new machine and the machine has been fine ever since.
It's worth getting it checked out.
ATB

The mac book air powers up but the screen stays black?

the macbook air powers up but the screen stays black?

Try resetting your SMC and PRAM. If neither work, contact Apple and have it looked at.
Resetting the System Management Controller >>
17" 2.2GHz i7 Quad-Core MacBook Pro  8G RAM  750G + 120G OCZ Vertex 3 SSD Boot HD 

Satellite A200 screen stays black when trying to boot

Hello everyone,
My Toshiba Satellite A200 notebook is not working anymore, so everything started when I was playing a game, suddenly, the screen turned blue with some tiny text written on it. I had to hold the power button a few seconds to close it because nothing was happening on the computer. I then pressed the power button to open it. Everthing was going well, until the welcome screen. At this part, it was written "Welcome" but the Vista loading circle left of it wasn't turning.
After a few seconds, I decided to close the computer again, so I did hold the power button so the computer closed. Here is the problem : I tried to reopen it, but the screen stayed black. Nothing was happening. The power light was blue, but not any computer activity. So I let it like that a few minutes then closed it and tried again, but the same thing happened. I tried to disassemble it and noticed one of the two memory card wasn't fully in its slot. I fixed it, but it didn't fix the problem.
I also tried to plug another screen on it, but that one was also black. So I put back the screen on its computer and tried to boot my laptop and it worked. It was booting, but the first problem came back, the Welcome screen was frooze there. So yes I did close it again and then the same thing happened, the screen stayed black.
I don't think the problem is the screen because as I said sometime it goes to the welcome screen. Also I don't hear any welcome sound when the screen stays black as if the computer would simply not start up. And as I said earlier, I don't see any computer activity on the little light in front of the computer. And left of this one, I clearly see that the computer is ON because the power light is blue.
So this is my problem, next time the computer manages to start up I'll try to boot it on the SAFE MODE, but until then, I don't know what to do. Please, help me.
Thanks in advance,
MrRoy
EDIT :
After letting the computer turned off for about 30 minutes, I started it, and booted in safe mode. At this step, I securely closed my comptuer with the shut down button instead on holding the power button. Then I reopened my computer, and it booted and the problem was fixed. Now my notebook is openened and working.
So if this is happening to you :
1. Shut down you computer.
2. Wait for about 30 minutes.
3. Boot in safe mode
4. Shut it down using the shut down button istead off holding the power button.
That should work.

Finally, it doesn't work. I don't know why but my computer did start up after the 30 minutes, but now it's not working anymore. It just won't startup like I said later, with a black screen.
The computer did work for about half an hour. I mean, I managed to start it up but after executing a program, it just froze and I had to hold the power button to restart it. I did it about 3 or 4 times, then it simply did the black screen again. I think the problem is my processor, maybe it's damaged or something, could it be possible?
Because I see that the processor isn't working when I try to start it up.
So let's say it's damaged, would that be the symptoms of my computer?
And if it's the processor, the only way to fix it is to send it to a reparator or something, because I don't feel like it, I'd rather do it myself.
But right now, my computer is simply not booting, like I said in my previous post.
Thanks in advance,
MrRoy
Note : The edit button wasn't there so I had to double post :/

How can I hook up 3 screens to a Mac Pro 8 core 2010 model?

How can I hook up 3 screens to a Mac Pro 8 core. One is a 23' Apple Cinema Display, the second is a 20" Apple cinema display and the 3rd is a 32' Sony Bravia HDTV (connected to mini port with mini/HDMI connector) Do I need to buy another video card? I have heard about 4 different scenarios about this, and they all sound a bit complicated. I thought that you could automatically connect 3 displays with the card that comes with the MacPro. It has a DVI port and 2 mini ports, so it appears that would be for 3 displays. But this is where it gets strange. Any thoughts?

Which video card? 5x70? If you read about the various scenarios thern for 5x70's you need two active adapters for thee monitors (TV considered a monitor). And you should have seen references to these apple docs:
Mac Pro (Mid 2010), Mac Pro (Early 2009): Issues with three displays and multiple DVI, HDMI connections
Mac Pro (Early 2009), Mac Pro (Mid 2010): Supported display configurations
It's not really complicated. Search out the appropriate adapters and hook 'em up. For the 23" and 20", if they are DVI, you need single link adapters. For the TV, if you end up using the DVI port for it (because possibly you can't find the appropate adapter cmbination) then you need to handle the audio separately since DVI doesn't carry audio.

IBook screen stays black at reboot no matter what keys I hold down

Hi, I posted a very similar issue a while back and was able to resolve it with some people's help:
http://discussions.apple.com/message.jspa?messageID=13196227#13196227
This time, I had to force shutdown cause the finder wasn't responding when I was transferring a movie to AppleTV. But now when I try to reboot, the screen stays black no matter what. I've tried booting while holding C, holding the mouse button and alt, but nothing brings me to the boot screen like last time. Similarly, I was low on Gigs, but I had a couple left and was in the process of making room. Would really appreciate any hep. I feel like a moron .

Were you getting warning messages that the hard drive is almost full? You may have corrupted the files on the HD.
Will it boot in Safe Mode? See What is Safe Boot, Safe Mode? (Mac OS X)
http://docs.info.apple.com/article.html?artnum=107392 Takes a while to run, but it usually "fixes" some problems.
Resolve startup issues and perform disk maintenance with Disk Utility and fsck
http://docs.info.apple.com/article.html?artnum=106214
 Cheers, Tom

Start-up problem with my Macbook - light stays on and screen stays black?!

Hi, sometimes when I start up my Macbook the switch-on light stays on and the screen stays black. Then I have to turn it off and when I restart it boots normally. What can this be? I resetted already the PRAM and the firmware is up to date. Perhaps someone understands german. Therefore I added my german post... Many thanks in advance!
Hi, hab ein seltsames Phänomen. Manchmal, vor allem nach ausgeschaltetem Zustand über Nacht, leuchtet nach dem Einschalten das Einschaltlicht auf und geht nicht wieder aus, wie normal wenn das Macbook startet, sondern bleibt an und der Bildschirm bleibt schwarz. Dann schalte ich das Macbook mit dem Ausschaltknof aus und warte ein paar Sekunden und schalte es dann wieder ein. Daraufhin startet es ganz normal. Woran könnte das liegen? Hab schonmal PRAM resettet und die Rechte auch repariert. Der Hardwaretest zeigt auch keine Probleme an. Kann man(n) noch irgendwie überprüfen, woran das liegen könnte oder hat das Problem auch schonmal jemand gehabt? Mein Macbook ist gradmal 2 Monate alt und hat das Problem erst seit kurzem. Könnte das vielleicht auch an einer Software liegen, die ich installiert habe. Kann sowas auch Auswirkungen auf den Bootvorgang haben? Bin Laie und würde gern wissen, ob sowas auch an der Pufferbatterie oder einer kalten Lötstelle liegen kann oder könnte das Macbook da dann gar nicht starten. Wäre für jeden Vorschlag dankbar... Vielen Dank schonmal im voraus!

Hi,
put me on the list as well. I was already in contact with ADC and it seems to me that they acknowledged it as a bug. I'm using a Mini-DVI-to-VGA adapter. And sporadically when unplugging it the internal display stays black or switches to the blue background and hangs there.
As I heard from friends who are using the Mini-DVI-to-DVI adapter in the same use case, this doesn't happen to them.
MB (CD 2 GHz), PB G4 15" (1.67 GHz), Mac Mini (1.66 GHz Core Duo) Mac OS X (10.4.8) iPod color 60 GB, iPod 1G nano 4 GB, iPod 1G shuffle 1 GB

My ipod 4g was working fine until i locked the screen but when i tried to turn it back on the screen stays black and its been 3 days. Does anyone know how i could fix this?

my ipod 4g was working fine until i locked the screen but when i tried to turn it back on the screen stays black and its been 3 days. Does anyone know how i could fix this?

- Charge the iPod for half an hour. Then reset the iPod:
Reset iPod touch: Press and hold the On/Off Sleep/Wake button and the Home
button at the same time for at least ten seconds, until the Apple logo appears.
- if still not working, connect to your computer. If iTunes sees the iPod, restore the iPod.
- If still problem, place the iPod in recovery mode and then try to restore the iPod. For recovery mod see:
iPhone and iPod touch: Unable to update or restore

What is wrong with the screen stays black

what is wrong with the iPod if the screen stays black and won't turn on, but is fully charged.

Could be one of the two:
1. Device sleep - Press and hold power button for six seconds and see if that wakes up the unit
2. Device freeze - press and hold the power and home button for few seconds till Apple logo is seen.
Hope this helps!

Macbook screen stays black

I opened my Macbook today and it made the usual sound, but the screen stays black. What can I do? Thanks in advance.

Hi iNonna and welcome to Apple Discussions!
So you got the usual startup chime but no video during or after startup, is that right?
I would start out by [resetting the System Management Controller|http://support.apple.com/kb/HT3964]. If there is no video after that, it sounds like you need to take the MacBook in for a repair. You don't say where you are but you can contact Apple for a repair at one of the phone numbers on [this page|http://www.apple.com/support/contact/phone_contacts.html] or carry it in to an Apple retail store. Be sure to [make an appointment|http://www.apple.com/retail/storelist> first or you may spend a long time waiting to talk to a Mac Genius.
Best of luck.

My iMac will not turn on, the screen stays black, makes a whistling sound 3 short, 3 long, 3 short, well maintained while keeping on, what solution do you have?

My iMac will not turn on, the screen stays black, makes a whistling sound 3 short, 3 long, 3 short, well maintained while keeping on, what solution do you have?

For some reason its firmware seems to have been corrupted. Read:
About the Firmware Restoration CD (Intel-based Macs)
iMac (Mid 2007) and later models: About startup tones

I locked my ipod before i went to bed the other night and i tried to turn it on the next morning and the screen stayed black and now i was wondering what i could do to try and fix it.(besides plugging it into itunes)

i locked my ipod before i went to bed a few nights ago and in the morning when i woke up i tried to turn it on but the screen stayed black so i put it on the charger to see if it was dead or not but it wasnt. i left it on the charger for an hour or two thinking it will turn on but nothing happened and i just tired to connect to itunes and nothing happened.

Hi,
Try a Reset of the Phone... You will Not Lose Any Data...
Press and Hold the Sleep/Wake Button and the Home Button at the Same Time...
The Apple logo will Appear and then Disappear...
Usually takes about 10 - 15 Seconds...
Turn the Phone On...
If that does not help... See Here:
Backing up, Updating and Restoring
http://support.apple.com/kb/HT1414

Imac G5 20" makes startup sound, and fan kicks in, but screen stays black

Hello. I have read the many similar postings and tried alot of ideas with no luck. Here are the specs on the model:
G5 20"/2.0/512mb/250gb/Super/56k/BT/AP EMC2056 Model A1076
When you push the power button, you get the bootup sound, and the fan turns on. Then 30 seconds later, the fan goes into hyperdrive. The whole time the screen stays black. I have tried resetting the pram, get no sound then. I have tried the internal startup button below the fan housing, and it does NOT have the 2nd button there as it is an ambient light model. So I held the power button and plugged in the power cord, still nothing. When plugged in, the 1st green light lights up on logic board. When I hit the power, the 2nd green light lights up. I have tried an external monitor with the adapter plug and still no picture. I do not even hear the hardrive try to read. Could it be a power supply? What are the other 2 lights on the logic board for, as there are a total of 4? I have not tried to boot from a cd or change the battery yet. I don't know if there is a point in doing that, as the screen remains black. I cannot use a conventional pc power supply tester either. Any other ideas on this situation?

"Could it be a power supply?"
More than likely if everything else possible has been ruled out. Your model G5 had an extension repair program which has long expired for your exact issue. Shame you missed it.
"I have not tried to boot from a cd or change the battery yet. I don't know if there is a point in doing that, as the screen remains black."
You won't know if it will do any good until you at least give it try. You should also run Apple's Hardware Test from the Install DVD #1. The DVD label will tell you which key to boot up from to run the AHT.
A few links to check out:
http://docs.info.apple.com/article.html?artnum=301733 iMac G5: How to Reset the SMU (iMac G5, the iMac G5 (Ambient Light Sensor), and the iMac G5 (iSight)).
http://support.apple.com/kb/TS2094 iMac G5: Troubleshooting when there's no picture on the display
iMac G5 Support
You could also try cleaning the interior of your comp.
See KB Article: http://docs.info.apple.com/article.html?artnum=300205 iMac G5 DIY (Do-It-Yourself) Instructions
iFixit has detailed take apart instructions.
Search YouTube for G5 iMac (your model) “How To” tutorials.
Your final solution may be to take comp to your local Apple Store or an AASP.
Good luck!
!http://i45.tinypic.com/jl0z95.jpg!

Second screen stays black Mac Pro

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