Macbook Pro: both external screens go off when unplugging power cord

Hello!
I have my Macbook Pro set up with two external screens one connected thru HDMI and the other with Thunderbolt, I keep the lid always closed. I always have the power cord plugged in but when I for whatever reason unplug the cord both screens go dark and don't seem to "wake up" anymore. When I plug back in the cord I have to open the lid first to make the login window appear but after login my screens are switched. When I close the lid again it goes back to my original set up. The same when I turn on the Macbook and don't close the lid after it right away, the screens are switched until I close it.
Any idea on this?

As this article points out, there are very stringent requirements for using a MacBook in "closed clamshell" mode. #1 is to have the power adapter plugged in:
How to use your Mac notebook computer in closed-clamshell (display closed) mode with an external display - Apple Suppor…

Similar Messages

I tried transferring my iphoto library from my old macbook onto my new macbook pro (via external hard drive), but when i open the new iphoto, it seems to have transferred ALL images ever used on my old macbook. so i tried to just del

i tried transferring my iphoto library from my old macbook onto my new macbook pro (via external hard drive), but when i open the new iphoto, it seems to have transferred ALL images ever used on my old macbook. so i tried to just delete all those images so i could try a different approach to transferring, but the new iphoto won't let me do anything and every time i try to delete anything it crashes (since the image amount is so high). please help!!
MacBook Pro, OS X Mountain Lion (10.8.2), iphoto '11, version 9.4.2

To move an iPhoto Library to a new machine:
Link the two Macs together: there are several ways to do this: Wireless Network,Firewire Target Disk Mode, Ethernet, or even just copy the Library to an external HD and then on to the new machine...
But however you do choose to link the two machines...
Simply copy the iPhoto Library from the Pictures Folder on the old Machine to the Pictures Folder on the new Machine.
Then launch iPhoto. That's it.
This moves photos, events, albums, books, keywords, slideshows and everything else.

I can't start my macbook pro because I turned it off when I got a trojan on my mac. When I turn my mac on I get the message that my computer restarted because of a problem. Then it turns off again and turns on again and it starts all over. What can I do?

I can't start my macbook pro because I turned it off when I got a trojan on my mac. When I turn on my mac I get the message that my computer restarted because of a problem. Then it turns off again and turns on again and it starts all over. What can I do?

Boot into your recovery partition (restart, hold down ⌘R until you see the Apple logo), and use Disk Utility to repair your hard drive. Repair permissions too while you're there. OS X: About OS X Recovery

Macbook Pro with external screen

Hello guys!
First my setup:
Macbook Pro 2011 13" Low-spec.
Acer 24" FullHD external screen.
Apple keyboard.
Wireless mouse.
Now what i want to do with this is, i want to have my macbooks lid open, but the screen shut off, so i can use the great resolution of my Acer screen.
What i've been trying:
Have both open at same time in mirroring mode - MBP's resolution is "default" but my Acer screen turns to a REALLY REALLY bad resolution. Even though it's still set to it's default as 720p it's really bad. Now if i turn it to another resolution on my acer screen, it's just still bad.
Because of that, i've been trying to close the lid - This gives me a really great resolution on my Acer screen, and it's all sharp and nice. But as soon as i open the lid of my macbook pro, it goes back to the really bad resolution. Now you may wonder why i can't use it with the lid close - Because i want to use the inbuilt microphone for "Ventrillo" maybe the trackpad too, and being able to use the webcam too would be perfect.
So the question is: How do i turn the screen of my macbook of, so my Acer screen can have it's great resolution, and still be able to take advantage of the macbooks inbuilt luxury stuff.
Any help would be highly appreciated.
Over and out.

You don't have to turn off the built-in display to use the Acer at its maximum resolution. Just turn off Mirroring in Displays Preferences, and you can set each display's resolution independently of the other. In Mirrored mode, both displays always operate at exactly the same resolution.

MacBook Pro as external screen

I have got a MacBook Pro with Retina display. Can i use it as external monitor for my iMac?

Yes, by using Screen Sharing or a product such as ScreenRecycler.
(77547)

Does the MacBook Pro support external screen rotation?

Hi people,
I have a MacBook Pro 15" 2.2 GHZ (with a GeForce 8600M GT), and I'd like to buy an external 22" screen that supports 90° rotation (Hyundaï W220D fyi
Does my computer with this graphic card support such a feature?
Thanks

Go to System Preferences>Displays, look at the window on the external display, there you'll see "Rotate", use the "Gather Windows" button on the internal display, select the desired angle, hit "Confirm", then physically rotate the external display. You can alter this sequence, but it might be difficult to move the cursor on the rotated display. (Nice skill though:-)

Brand new MacBook Pro OS X Lion turns off when iPad connected

I have a brand new MacBook Pro and I connected mt iPad to it tonight. I have connected it once before sync it when I got the MacBook. Tonight every time I tried to connect it the MacBook would turn off (poof!) When it turned on, It came up with a USB disabled as something draining too much power message. The laptop is plugged into the mains directly at the wall socket.
I tried a different cable and it causes the message or shuts off the laptop. I used the same cable in my husband's iPhone and it is working.
Is it the MacBook or the iPad? It is a 1st gen still under warranty. What should I do?
All help will be appreciated. I reset the PRAM already.
Thanks

Can you run an Internet Speed Test? Reboot first and don't open any programs but Safari to perform this.
You can use any website, here's one listed below:
speakeasy.net/speedtest

My macbook pro suddenly freezes; screen turns off and computer freezes. Have to hard restart. Error message appears upon restart, saying something about kernel, etc. Can anyone please help on this issue?

For the past month or more I've encountered what I consider to be quite a serios problem with my Macbook pro. The laptop suddenly freezes without warning, the screen turns black, while the hard drive apparently stals and the system no longer responds. The only way to resolve this issues is to restart the computer via a hard reset. After restarting, an error message box shows up asking me to report the error, which I've already done on numerous occassions. The problem occurs at a frequency of 1 every 2-3 days, sometimes more often than that. The error message that comes up is very complicated but contains some key words amongst which includes "kernel." This makes me believe that it's an issue with the video card, and was wondering how I can remediate this problem so as to get the normal function of my laptop back. If anyone can be of any help, I would greatly appreciate it.
Andrei

For the past month or more I've encountered what I consider to be quite a serios problem with my Macbook pro. The laptop suddenly freezes without warning, the screen turns black, while the hard drive apparently stals and the system no longer responds. The only way to resolve this issues is to restart the computer via a hard reset. After restarting, an error message box shows up asking me to report the error, which I've already done on numerous occassions. The problem occurs at a frequency of 1 every 2-3 days, sometimes more often than that. The error message that comes up is very complicated but contains some key words amongst which includes "kernel." This makes me believe that it's an issue with the video card, and was wondering how I can remediate this problem so as to get the normal function of my laptop back. If anyone can be of any help, I would greatly appreciate it.
Andrei

IBook screen goes black after unplugging power cord

I originally posted this topic in the wrong discussion group for iMac G4, the computer is actually an iBook G4.
My wife's iBook bought about 2 years ago shows battery 100 percent charged. But when she unplugs the power cord the screen goes black. Can not be restarted until she plugs in the power cord. It seems like it might be the battery. She got extra batteries when she bought it. Is there a way to tell if it is the battery before having to replace it?

Did you check on the status of your battery using "About this Mac" under the Apple on the menu bar? Click on "More Info..." and select Power under Hardware. It will tell you capacity and cycle count.
You may have a dead battery.
Also check out thread:
http://discussions.apple.com/thread.jspa?messageID=11455411&#11455411

PB freezes when unplug power cord from laptop but not power outlet

Hi. Been having a dilemma with my PB for awhile. When I unplug the power cord from the connection in the PB, my laptop will work fine for a few minutes but always freeze at some point. By 'freeze' I mean the cursor will not move and the keyboard, trackpad, etc will not respond at all. I can restart it and continue to work until it will (always) freeze again. Strangely enough, if I unplug the power cord from the wall outlet but leave it in the side of the PB, I don't have any freezing problems. I'm not that savvy with Apples yet since I made the switch but I've tried resetting the pram thing but to no avail.
Any suggestions?
Thanks!
PB 17" 1G RAM Mac OS X (10.4.8)

Welcome to the Apple discussions.
You might try resetting your power management unit by following directions at http://docs.info.apple.com/article.html?artnum=14449 .

My macbook pro keeps freezing and shutting off when I am browsing the web on Safari. How can I figure out what is causing this issue?

For the past few weeks my computer will slow down when I have been on Safari for awhile, then freeze, and then just go black. I have to press the power button and then it goes to a black screen with the apple logo and a loading bar underneath when it reboots. I'm not sure what is causing the issue, but on my previous mac it would have an error message if something like this happened that I could submit. Any suggestions of where to start to solve this issue?
Thanks!

These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
Step 1
For this step, the title of the Console window should be All Messages. If it isn't, select
          SYSTEM LOG QUERIES ▹ All Messages
from the log list on the left. If you don't see that list, select
          View ▹ Show Log List
from the menu bar at the top of the screen.
In the top right corner of the Console window, there's a search box labeled Filter. Initially the words "String Matching" are shown in that box. Enter "BOOT_TIME" (without the quotes.)
Each message in the log begins with the date and time when it was entered. Select the BOOT_TIME log message that corresponds to the last boot time when you had the problem. Now clear the search box to reveal all messages. Select the ones logged before the boot, during the time something abnormal was happening. Copy them to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
For example, if the system was unresponsive or was failing to shut down for three minutes before you forced a restart, post the messages timestamped within three minutes before the boot time, not after. Please include the BOOT_TIME message at the end of the log extract—not at the beginning.
If there are long runs of repeated messages, please post only one example of each. Don’t post many repetitions of the same message.
When posting a log extract, be selective. A few dozen lines are almost always more than enough.
Some private information, such as your name, may appear in the log. Anonymize before posting.
Please don't indiscriminately dump thousands of lines from the log into this discussion.
Please don't post screenshots of log messages—post the text.
Step 2
In the Console window, select
          DIAGNOSTIC AND USAGE INFORMATION ▹ System Diagnostic Reports
(not Diagnostic and Usage Messages) from the log list on the left. If you don't see that list, select
          View ▹ Show Log List
from the menu bar.
There is a disclosure triangle to the left of the list item. If the triangle is pointing to the right, click it so that it points down. You'll see a list of reports. A crash report has a name that begins with the name of the crashed process and ends in ".crash". A panic report has a name that begins with "Kernel" and ends in ".panic". A shutdown stall report has a name that ends in ".shutdownstall". Select the most recent of each, if any. The contents of the report will appear on the right. Use copy and paste to post the entire contents—the text, not a screenshot. It's possible that none of these reports exists.
I know the report is long, maybe several hundred lines. Please post all of it anyway.
If you don't see any reports listed, but you know there was a crash or panic, you may have chosen Diagnostic and Usage Messages from the log list. Choose DIAGNOSTIC AND USAGE INFORMATION instead.
In the interest of privacy, I suggest that, before posting, you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if it’s present (it may not be.)
Please don’t post other kinds of diagnostic report—they're very long and rarely helpful.

My 2012 Macbook pro has a screen glitch.

My 2012 Macbook pro has a screen glitch. When typing it backspaces and takes awhile to load what is being typed. Also the screen will flash. This happens not always but quite frequently. Any ideas on what the problem is?

You should contact AppleCare as soon as possible.
MBP is in warranty for 1 year from the date of purchase.
AppleCare: 1-800-275-2273.
Standard troubleshooting step for these kinds of issues is to reset SMC.
Reset SMC. http://support.apple.com/kb/HT3964

Emptying trash isn't freeing up any space on MacBook Pro or external drive. Time Machine is OFF.

Yesterday, while using Final Cut Pro X, I noticed the program/my computer was starting to run slow--and then I was totally caught off guard by a warning that my startup disk was full. I checked Storage and Finder and both my MacBook Pro and external drive had less than 1gb of space each! I usually use Secure Empty Trash and have no problems...but for my drives to be full, it clearly hasn't been working for a few days, possibly weeks.
I'm using a MacBook Pro (early 2011) and a LaCie Thunderbolt external drive. I'm running Mavericks (10.9.2)
I am not using Time Machine. When I look at Storage under About This Mac, my Backups on my MBP and LaCie drive are both at zero KB.
I read through the forums and tried going into Terminal and entering sudo rm -rf ~/.Trash ...but all that did was free up about 10gb on my external drive (I'd emptied upwards of 90gb from my trash).
Right now I'm basically stuck with a slow laptop and very little storage space, which has slowed my work to a halt. Does anyone know how to fix this?

Some space suggestions.
Disk Space - Free Up
Disk Space – Free Up (2)
Disk Space Filling Up – OmniDiskSweeper
Disk Space Filling Up - WhatSize

My macbook pro shows blank screen when I started..help me..

My macbook pro shows blank screen when I started . (It's like in same state when power off. ) fan sound and hard disk is running. So i connected it Through external monitor via mini display to VGA cable. I can see everything on external monitor. My display of Mac needs to change? How much it cost ?? I found so many forum discussion said that if nvedia card is faulty then its happen...let me know suggestions...I given it to apple care service station n they r telling yr display needs to change its cost me a lot.. I can't afford. And can't spend that much for 3 yr old version as new versions of macbook pro is cost vice reasonable.. can I have any suggestion?

If running 10.7 or later hold down Command-R at Startup.
This should invoke recovery Mode.
Choose Disk Utility.
Select your Hard drive. Inspect the SMART Status in the lower right of the window for "Verified".
Select the Mac OS X Volume (originally Macintosh HD) click (Repair Disk)
If errors, run again until it comes clean or gets stuck.
Report any error messages.

I dropped my macbook pro and the screen is broken can i still use it with an external monitor? Or can I or how do I transfer hard drive files to my mac mini?

I dropped my 17" macbook pro and the screen is broken. Can I still use it with an external monitor? When I plugged it into a monitor I had used it with before, I'm not able to see anything on the macbook screen to control it. It came on but I just got the blue screen with nothing else after typing in my password. (Didn't see the password form just assumed it was there somewhere and it did go from space to blue screen but no desktop icons, files, dock strip at top or anything else, just blank blue screen) so I can't access the system preferences.
Or can I / or how do I, transfer hard drive files to my mac mini? If not salvageable as is can I pull out the hard drive and make it an external harddrive? In otherwords is anything salvageable? It seems it's coming on I just can't access anything. BTW I was told it would cost aprox $1000 to replace the screen! I paid almost $4000 for this thing and it was running great - makes me sick to lose it!

I'd like to promise you that everything will be fine if you just get the monitor going - but it's hard to know what the hardware damage might be. It might be the monitor, or the damage might be greater.
Your best solution would be visit your local Apple Store and let them know what your situation is. They have access to diagnostics you don't, and they might be able to the best way to save your data and keep you computing. It's still not covered, but they can tell you what your current options are.
Um, you might consider investing in a backup drive.
And there other repair options, too. Powerbook Medic http://www.powerbookmedic.com/xcart1/pages.php?pageid=67 offers reliable repairs, and quotes prices well under Apple's.

Macbook Pro: both external screens go off when unplugging power cord

Similar Messages

Maybe you are looking for