MacBook Pro :: 13" Target Display To IMac - Black Screen?
Apr 26, 2012
I have a MacBook Pro (13'', Early 2011) & iMac (21.5", Mid 2011) using a Thunderbolt Cable to Target Display. Everything was working find and I could Command F2 to Target Display as expected.However, about a week about this stopped working. Now when I try to Target Display the iMac goes to a Black screen (like it's switching to Target Display) and the MacBook Pro does nothing. The iMac will be at the Black screen until I Command F2 again (or disconnect the Thunderbolt Cable), then the iMac goes back to the normal display. I have tried another Thunderbolt cable with no luck. I have perform all software updates on both machines (now both running 10.7.3) and fixed Disk Permissions. I have also found that restarting my MacBook Pro allows this to function as excepected (Command F2, Blue Flashing Screen, Target Display on the iMac). However, this is not an ideal situation since having to restart my computer is time consuming. Â
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May 24, 2012
I came back from work to wake up my iMac. It made the noise but the screen stayed black. I tried restarting by holding the power button- I can hear it start and the chime but still have a black screen. I tried resetting the pram, and unplugging the cord but I still get a black screen. I can hear the chime though; I'm not sure if that means anything. I just had the hard drive replaced in February so I hope it's not that. just wanted to clarify that when I restart, I get the chime but the screen stays black- I don't get to the grey screen. So I'm assuming right now that my display may be shot?
Info:
iMac (20-inch Mid 2007), Mac OS X (10.5.8)
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Sep 9, 2014
My screen went black after sleep and now I can't do anything anymore. I restarted a few times, tried to start from backup (USB) and also to mount in target mode via another computer, but nothing is working. I first thought the graphics card had gone, but that doesn't seem to be the case now as it's not showing via firewire. The computer is on as I can hear the drive spinning. it woulÂ
Nothing particular happened beforehand. It worked fine, although a bit sluggish earlier. I do maintenance quite regularly and it has been fine, except that the battery needs replacing.Â
Info:
MacBook Pro, Mac OS X (10.7.5)
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Sep 11, 2010
1st time posting to this forum. My iBook G4's (1.2 Ghz) screen flashes grey/white for a brief second upon startup and then remains black. No ghosting at all... simply black screen though computer is running fine. Later, I decided to connect it to my desktop Mac and restart it in Target mode, and was surprised to see the standard blue screen with moving Firewire logo screensaver on my iBook's screen - no different than anytime before when I've booted in Target Mode.
I ran Diskwarrior on my iBook's HD from my Mac desktop and all was clean so not a HD problem. Btw, I used SuperDuper to copy my iBook's HD to Disk Image for backup.
With some semi-calculated guessing on my part, I had come to the conclusion - prior to seeing the Target Mode screensaver on my laptop's screen - that the LCD screen had gone bad. As a result of what may have been flawed reasoning on my part, I purchased a used replacement screen off eBay from a reputable seller. I will be getting that replacement screen in a few days (including working inverter board).
My question here is can the LCD screen actually be bad and need replacing IF the Target Mode screensaver works beautifully on it? And the follow-up question is if it's not a bad LCD screen, what might the more likely problem be? It doesn't seem like it would be a backlight problem because moving yellow/orange Firewire logo of the screensaver looks fine.
A couple of things probably worth noting here:
Earlier before first experiencing my black screen issue, the power cord was accidentally jerked by a passing foot when laptop was on floor. It was enough of a jerking motion to move the laptop's position on the carpet but I didn't think it was that bad at the time... now wondering if something may have been pulled loose inside.
As those familiar with the iBook will know, the power connector light is orange when computer is turned off and it's also orange when laptop is in Target Mode (with the screen seeming to work correctly). However, when not in Target Mode and turned on with screen black, the power connector light is green as it normally would be. Is it possible the screen is powered via Firewire port when in Target Mode and therefore bypassing some screen power situation via the power connector? Obviously the power connector must be working if i'm able to power up the iBook without the battery installed.
Now for the other bit of info which seems important to me and I'm embarrassed to even admit to here.. Just prior to experiencing my black screen problem, i was plugging my power connector into an electrical outlet near where I was going to use my iBook... In the past, I have always done that PRIOR to plugging the power cord into my iBook. Regrettably, that time I already had the power connector plugged into my iBook. While attempting to plug the connector into the electrical outlet, the prongs did not easily slide into the outlet and I heard some popping sounds which didn't seem too bad at the time. But it was immediately after that when my iBook's screen failed to start up.
Thanking anyone in advance who may be able to offer up some expertise regarding my situation. Also I should say that I am running OS 10.5.8 on my iBook. I realize the easiest thing for me to do to get this matter resolved would be to simply take the unit into a local service center for repair... but the value of the iBook at this point wouldn't be worth spending a large sum of money for repairs I likely can do on my on. Over the years, I've learned how to follow direction pretty well when it comes to replacing defective items inside my desktop computers, so I'm not terrified of doing same with my iBook.
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Dec 1, 2014
I have a new 27" iMac retina display. Is there any way to use it as an external display (since it does not support Target Display Mode)?
Info:
iMac with Retina 5K display, OS X Yosemite 10.10.1
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Dec 21, 2010
For the past few weeks it has been going to a black screen when trying to wake it up from sleep. Either I've put it through too much work lately editing all these photos and its really tired. So, often it wakes up normally and functions fine, well, not really. It is seemingly very slow. It requires a lot of time (more than before) to open up a program or it gives me the "spinning wheel of death" when trying to go to a different page on the internet or open up a folder on my desktop. Amongst other things that require it to think. So It's just a lot slower in general than before.
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Jun 2, 2014
Black screen on my iMac, how can I get it back to log in screen?
Info:
iMac
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Jul 22, 2008
So for the first time in over a year since I purchased it, my iMac crashed twice.The first time was this morning, i went to do something and the screen went black, and my secondary display got black and white lines. I had to restart. And the boot screen with the apple logo hung around for a while.
Then, later on the screen went whacky after trying to wake it from sleep (not full sleep just display sleep) and had a bunch of moving lines and then I couldn't see anything. So luckily I got a picture. After restart, it seems fine.I'll call apple care in the morning, but thought i'd try my luck here.
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Dec 16, 2009
So I have a Mac mini set up with Windows 7 only and then I have that connected to a 27" iMac with the miniDP cable.
At first, during installation, I have no issues; Windows is installed and drivers are done... reboot.
I start seeing artifacts, especially in dark areas (little sparkling pixels of colors--kind of like white noise except it's not everywhere and this is in color), also every few seconds the screen would flicker, and occasionally the screen would change to where the bottom of the be on top (hard to explain, but imagine a movie where the frame isn't centered and you can see the bottom of the previous frame and the top of the current one).
I figured it was an issue with the iMac, so I switched back to the iMac and there are no issues. I switch back to the Mac mini and screen is still messed up.
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Oct 23, 2010
I use a Belkin AV360 so I can play my Xbox 360 on my new 27" iMac using target display mode. it has been working flawlessly since I got the AV360 until today where I haven't been able to get target display mode to work.
I've checked it is not the Xbox 360 being the problem tested it on my housemates TV. am also pretty sure it's not the Belkin AV360 itself because in system profiler under USB devices it says the "AV360 miniDP Converter" is pluged in and say same in Windows 7 bootcamp under device manager. I also tried my laptop which has a HDMI out on it.
my laptop says there is a "Belkin dongle" plugged in, I set the laptop to use the Belkin dongle at a external display and still I can't get target display mode to work.
Normally when I turn my Xbox on it automatically goes into target display mode or I can press cmd + F2 so to switch between iMac and Xbox. I have also tested my housemates Xbox in my setup and still the same problem.
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Dec 27, 2010
I am thinking about using my iMac as an external display for my Dell Laptop listed in my sig. Most of the time at home I can work on my iMac, but occasionally I use windows, and I have the dell for that. According to Apple:
"On the 27-inch iMac, the same port offers input, too. So you can connect any external source that has DisplayPort output � including a MacBook or MacBook Pro � and use your iMac as a display."
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Oct 21, 2009
I just saw this new thing TDM, and I'm really interested, meaning I can hook up my MacBook to it and all sorts of other stuff. I've been trying to find more info on apple's site and google but there's nothing much mentioned.
Can anyone tell me what kind of cable is required? Will it eventually need like 10 adapter heads?
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Nov 8, 2009
Only the 27" iMac supports this feature. I'm seeing a lot of incorrect info thrown around the forums.
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Aug 3, 2010
I have a November 2009 27'' i5 iMac and a 2010 Macbook Pro 15'' i7. After installing the iMac's Target Display Update 1.0 and 10.6.4, I'm no longer able to connect the MBP to my iMac. When I plug in my mini displayport cable, the iMac's screen goes black for a few seconds, then the MBP's screen flashes blue for a second or two, and then back to normal, and finally, the iMac's screen goes blue for 5 seconds or so, and then back to the desktop.
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Jun 5, 2014
Target Display Mode display mode won't work with my imac 21.5" mid 2011. I tried both commands cmd+f2 and cmd+fn+f2 but nothing! I'm using thunderbolt cable to connect my macbook air. Why I'm can't use my imac as external monitor?
Info:
OS X Mavericks (10.9)
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Apr 16, 2010
Does anyone know if it's possible to use a 24 inch iMac as a Target Screen? I know it's possible for 27 so there must be a hack or terminal command line that I can enter to achieve this.
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Jul 8, 2010
I have a core i7 MBP with the high res display, and when the display is showing black, a horizontal green line appears on the screen. It is only visible when the screen is showing black or another very very dark color, and the line is not visible with the screen off. It isnt something on the screen, as rubbing it does not affect it at all. I cannot post a screenshot of it, because it does not appear in the screenshot (it does on my screen, because the line is there physically, but on other monitors it is not visible).
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Sep 5, 2010
So I've got my MBP that I've had for about 4 months, the thing is. It just recently started to have screen flickering issues. I'll be sitting doing w/e as usual and all of a sudden the display goes dark, almost black, for a second, then comes back up again. I have yet to find any trend in when this is happening, but it is definitely happening on battery as well as plugged in, but it seems to be getting worse.any one have any idea what this could be, something I can fix on my own, or should I take it in?
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May 20, 2012
My images on my screen are like in black and white.
Info:
MacBook Pro
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Dec 8, 2008
Today, I bought a vga adapter for my unibody macbook and it is not working. I hooked it on a 22 inch Samsung 225MW screen and it the screen shows a message "check your cable (PC)".
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May 11, 2012
I have a early 2011 MacBook Pro 13" running the latest version of Lion. I have been using my MacBook with an external monitor since I brought it in 2011 and have had no problems with connecting it to my external monitor. Connected via mini display port DVI adapter and a DVI cable to a Philips monitor.
Two days ago when I plugged the MacBook back in to the monitor I connected and but now only displays a black screen, I can move the mouse off the MacBook screen and over to the external monitor and back but it is not displayed on the monitor. I have tried connecting other devices to the monitor and they work fine.
Info:
MacBook Pro (13-inch Early 2011), Mac OS X (10.7.4)
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Aug 23, 2014
my macbook air 13 display only black screen and pointer when wake up from sleep. its not frequently happen. to become normal it take 10-15 sec, is it hardware problem or software problem?
Info:
MacBook Air, OS X Mavericks (10.9.4)
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Sep 5, 2014
Macbook pro 2014 only had it for about 2 months but recently about three weeks ago the display has been flicking to a black screen but has gradually been increasing and it now happens every two minutes - just randomly goes black for about 5 or 10 seconds and sometimes goes back to home screen but sometimes goes to log in screen, It interferes with me trying to do my work when this happens so frequently
Info:
MacBook Air, iOS 4.3.3, Transferring from Windows XP
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Aug 17, 2009
I have a 2 month old 13" MBP which I absolutely love. The only hitch is that there is an oddity when connected to my Dell 2008wfp display. It only happens when I wake the MBP from sleep. A number of things happen sometimes. Usuaully, when I wake the MBP from sleep, i get a black screen on both displays and all I can see and control is the cursor. Sometimes the main display will be black, but the MBP display will show the desktop wallpaper, but again, I can only see and control the mouse cursor. It should also be worth mentioning that the keyboard is rendered non-functional as well.
Sometimes, OS X will appear on both displays, with mouse cursor active, keyboard inactive, but I am unable to click anything or interact with anything OS X.
Anyway, I'm at the point where I need to mention this because it happens quite frequently and its getting rather annoying. The only way I can get out of this hang, is to cold reboot the machine. It happens everyday and at least 50% of the time I wake the MBP from sleep. When not connected to the display, I never get this occurrence. Also, this display worked perfectly when I used to own the classic 15" MBP, so its hard for me to pinpoint what exactly is the anomaly that is happening.
Anyone else experiencing this same issue? I am using a mini display port to DVI adapter to the Dell display.
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May 7, 2010
Well my unibody macbook display decided to screw up last night, it was working fine last night no problem. Connected to a external monitor. I fell asleep last night with front row left on, obviously it went to sleep and then I woke up and the screen was black. Now the LED lights are working, my external display is also working. The display settings recognize a screen being present (when I click detect displays and gather windows - 2 windows appear). Ive reset PRAM, SMC, reseated the RAM, control+shift+eject (which just made the screen flicker a little after turning it back on) and Im out of ideas. Its out of warranty and about about 18months old.
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Apr 9, 2012
My Mac Book Pro just stopped accepting commands, the screen is freezing on a black screen and the keys have no bearing on the situation. The only way I can get it to stop is pull the battery out. It has been acting funny lately.
Info:
MacBook Pro (17-inch Early 2008), Mac OS X (10.5.6), final cut express
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Dec 14, 2009
I'm traveling at the moment with my MBP 17". Arrived at my friends place who has a base iMac 21.5". Since I prefer to use the slightly larger screen to work off (even though my 17 MBP has more pixel density). So startup the iMac via TDM on my 17 MBP and to my surprise it works! - as my MBP only has leopard 10.5.8. I would have thought these iMacs would not run unless you have SL 10.6 loaded. It worked the 1st time, but crashed (grey vertical shade of death) twice after. On the 4th time it worked again. So that was weird (the inconsistency). Maybe 10.5.8 is NOT meant to be compatible with the new iMac's?
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Jun 23, 2014
I've noticed that when my rMBP (late 2013, Mavericks) turns off the display automatically while on battery (as configured via Energy Saver) and I try to wake it immediately, I get a black screen with the cursor, rather than my password/unlock screen. It remains a black screen, with the cursor moveable, for 5-10 seconds or so, and then the password/unlock screen will appear as usual.Â
This does not happen if:I don't try to wake the display/computer immediately after automatic display sleep (e.g., I wait 5-10 seconds and it's fine)I turn off the display using a hot corner and immediately wake the displayI put the computer to sleep by closing the lid and immediately wake it by opening the lidI select Sleep from the System/Apple menu and immediately wake it by pressing a key or clicking on the trackpadÂ
Why automatic display sleep is causing this temporary black screen? I currently get around it by setting the time for automatic display sleep while on battery to 10 minutes instead of the default 3 minutes to minimize the chances of needing to immediately wake the screen. I'd like to keep it at 3 minutes if possible to maximize energy savings, but the temporary black screen is really annoying if I didn't really want display sleep and consequently have to wake immediately.
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Mar 5, 2012
I want to buy the 27" iMac - but only if I can use it as external monitor for my Lenovo laptop when working from home. A the Apple store in London they said that this is possible with a Belkin converter from hdmi to mini display port (with a USB power caple to turn it into an active signal). The laptop also has a displayport.
Info:
iMac
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Sep 28, 2010
I have a Mac Pro (Early 2008) running on 10.5.8 OSX with apple 20" display and 16G RAM.
Initially started with my MACPRO not waking up from sleep and has to force the shut down with power button. Finally realised it was due to my Epson scanner connected via USB...
The main issues now is with the display, black screen on startup. I can still control the volume and disk eject/close, just no display. Force shut down with power button numerous time but futile. Finally solved it with SMC reset.
it becomes an on and off issues... and continuously I solved it with SMC reset.... sometimes needed 2 or 3 resets to get it to work,and finally for the past few days... SMC reset can't solve it either... no display on startup, and same thing I can control the volume and disk eject/close. Have tried my monitor on other mac and it worked fine.
Now this is strange. if I let the mac cool off totally,after a SMC reset. the display will comes up fine...
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