OS X :: External Display Blinks/flashes When Connected To MBP
Jun 12, 2010
I use my MBP connected to a Dell U2410 and everything has been ok for the last 5 months or so (I got the MBP around the beginning of Feb.). However recently, my display will start flickering (blinking) a blue screen up to the point that it is completely unusable. Often if I simply unplug the mini displayport from the mbp and plug it back in again, everything goes back to normal for awhile. Just now I was able, between flickers, to switch from the integrated graphics card to the dedicated (?) graphics card. Although I did get a few flickers logging back in, so far it's been ok.
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Sep 1, 2009
Every now and then, i get these random flash of black near the top of the screen. Its like a quick split second blink. I never had this problem in regular leopard. I'm not sure if I have a faulty GPU but I think i might too cause when I'm on battery power 9400m, the graphic performance goes down.
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Sep 4, 2014
My external display (HP w2207) seems to conflict with my MacBook Pro (15 inch Retina display, early 2013) since I upgraded MacBook OS to 10.9.4.The external display works at initial boot of Mac but does not work after OS sleeps and I attempt to awaken, and while the external display is not waking, the Retina display flashes through different screen views, which only partially reflect my normal screen, or do not reflect my normal screen at all.Â
Info:
OS X Mavericks (10.9.4)
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Mar 1, 2010
I have recently bought a 13" Macbook Pro and wanted to hook up an external display (an oldish acer 19"). I have a Mini Displayport to DVI adapter hooked up to a DVI -VGA adapter which leads to the display. I haven't got it to work yet. I have followed advice about closing the lid and using usb mouse and keyboard with no luck. The only thing that happens is that the screen on the laptop flashes blue for about a second after plugging in the Mini DisplayPort adapter.
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Sep 26, 2010
I have a MacBook Pro 13'' (mid 09) and another MacBook pro 15'' (early 09). The problem below applies to both of them.
I often use my 15'' mbp connected to a usb keyboard, mouse, display etc. Basically it is used as a stationary computer that can be easily moved (to work/school etc). This is my main laptop so this is where I noticed the problem first. Sometimes when just using the computer as normal (using itunes, opera, adium etc) the OS X will just suddenly become very sluggish and unresponsive.
However it is not OS X itself, but the GUI! Example: if I move my mouse over the dock, it wont animate. If I try to do any finder related action the GUI response is way of and if I try to do something in the menubar I have to hold left click, if I let go it just closes the menu.
This goes for the application folder as well (I have it as a list). Normally it will just funtion as normal but when this problem occurs I have cant let go of the mouse button when moving through the menus because then the menu closes!
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Jul 31, 2010
When I connect my 13" MBP to an external display to watch a movie etc. the external display seems to be darker than it would appear if I was watching on my MBP. Is there anything I can do to make things brighter (other than turning the brightness up on my TV)?
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Aug 16, 2010
I have a 2009 Mac Mini connected to a 22" LG monitor via Mini-DVI port and it's also connected to a 50" Pioneer Plasma (in the next room) via Mini-Displayport. Everything works perfect except that when I turn off the Pioneer Plasma, my mouse can still scroll over from the LG monitor to the Plasma.
I've also noticed that my screensaver is laggy even when the Plasma is turned off (usually that happens when it's drawing the screensaver on both screens) so it must still be sending a video signal out of the Mini Displayport.
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Sep 1, 2009
I'm having a problem with my display that I have had for a week now. It's connected to a MacBook via mini display port. At random times the display will go completely black for about one second and then come back on. This does not seem to have an affect on anything else. The display is beautiful other than this quirk. there are many people discussing this same problem, not only with a regular MacBook like mine but also with the MacBookPro.
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Nov 21, 2010
WITHOUT closing the lid, because i like using the touchpad. i know that you can turn the brightness all the way down, but sometimes windows from the main screen randomly open on the other display. and it also slows down performance. i want to turn off the 13" screen as if the lid was closed. that way, the mac doesn't even see it.
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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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Jun 25, 2014
I have a Late 2011 MBP, just recently I also go an Xbox and wanted to hook it up to my external display that I have been using for a long time with no issues. I went and bought this: URL....to be able to easily switch between the two inputs. The xbox works fine, however when I view my Macs input the screen flickers a static image very frequently.Â
I know what you're thinking, it's probably an issue with either a cable, or the device. But when I boot into Windows via Bootcamp with the same exact setup, there is no flicker at all. The display is a dell s2440L, the HDMI adapter is a rocket fish.Â
Here are the troubleshooting steps I have tried:Â Resetting PRAM/SMCChanging out HDMI cables on both the Splitter output, and the inputs (I tried 3 different cables on both the inputs, and outputs.)Downgrading OSX to 10.7 (And then went back to 10.9)Lowering the resolution on the monitor (Lower resolutions flicker just as much, if not more.)Resetting the splitter by unplugging the HDMI cord powering it and plugging it back in.and of course, plugging my computer into the splitter input that the Xbox works fine on, as well as taking the xbox one out so the computer is the only input on the splitter.Â
Like I said, the Xbox works fine, and even the computer works fine in Windows, but whenever I boot into OSX my screen flickers with this static. I should add, the display works fine when not connected to the splitter on OSX.
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Sep 5, 2014
My Macbook Pro (early 2013, OSX 10.9.4) does not come to sleep mode – 10 secs after closing the display lid apple logo starts glowing (blinking) on a random intervals.Â
I have tried the following methods that HAVE NOT solved the issue:
* PRAM reset
* SMC reset
* Power Nap is disabled (with enabled I still get the same issue)
* WiFi is off
* Bluetooth is off
* no external devices connected
* no antiviruses or other programs that I would suspect to cause this
* sudo rm -r -f /Library/Prefrences/SystemConfiguration
* finally reinstalled OS X, and I still got the same issueÂ
Surprisingly, if I enter to sleep mode via menu: Apple>Sleep, there seems to be no issue! I have tried changing pmset -1 lidopen 0 to validate if lid is preventing from going to sleep mode, however it has not fixed the issue. Â
I see this text in the Syslog:Â
--- last message repeated 1 time ---
Sep 3 21:16:00 Users-MacBook-Pro.local WindowServer[86] <Warning>: device_generate_desktop_screenshot: authw 0x0(0), shield 0x7fb909487660(2001)
Sep 3 21:16:00 Users-MacBook-Pro.local WindowServer[86] <Warning>: device_generate_lock_screen_screenshot: authw 0x0(0), shield 0x7fb909487660(2001)
[Code] ....
Info:
MacBook Pro with Retina display, OS X Mavericks (10.9.4)
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Sep 8, 2014
I bought a MBA 13" last month and now I'm trying to connect an external monitor through a Mini Display Port-to-HDMI adapter and most of the times the display shows a message "No signal detected"...
I've tried all the possible combinations between the MAC and the Monitor but it would seem a random matter.
Info:
MacBook Air (13-inch Mid 2012), Mavericks 10.9.4
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Aug 17, 2010
So I bought my MBP this past May and didn't have problems with it until now. I recently opened up my photo booth and noticed that the display flashes very quickly into different lightings/colors. It's very strange because the ceiling fan isn't on, and my MBP is sitting still. I've never seen this issue on anyone else's MBP either. I'm leaving for college very soon and don't want to leave unhappy with my MBP. If I visit the genius bar, will they give me a replacement with my one-year warranty?
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Dec 4, 2007
I have a 30-inch cinema display and a Power Mac G5 (quad). Last night I was toying around by trying to boot an old 450 MHz G4 connected to my G5 via firewire ( I need to do some work on the G4 and it doesn't support my big display). So I connected it to my G5 via firewire target disk mode, then selected the disc (which has 10.2 on it) in the Startup disk preferences via System Prefs. Then I tried it and got a kernel panic. Alright, so it didn't work. Oh well. But now that everything is disconnected and my G5 is back to it's normal state (meaning the G4 isn't connected at all), when I start up, my display acts very weird. I get a few flashing colors blocks at the beginning, then it blacks out. Then when I login, it goes black again, then pops back on. So I'm trying to figure out what I did to my baby and how to fix it.
Information:
Quad-core 2.5 G5
Mac OS X (10.5.1)
30" Apple Cinema Display
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May 21, 2010
I hooked up my macbook pro to a mini display port to a dvi -> hdmi to my tv no problem. However, when I hooked up the mini display -> dell monitor, I get nothing. The screen is black. The weird thing is that my macbook pro recognizes that a second monitor is plugged in... it just won't display anything
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Jun 16, 2009
I have a mid-late 2008 MacBook connected to a Dell U2211H monitor using a Mini DisplayPort -> VGA connection.
When I use 1920x1080, I only get 60 Hz and the display is a fuzzy (text). Also, there are black bars. Why?
Will my issues be solved using a Mini DisplayPort -> DVI connection? Or should I exchange it for the 2209?
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Dec 13, 2009
Just been looking through About This Mac and noticed this in under the Graphics/Display section.
NVIDIA GeForce GT 120:
Chipset Model:NVIDIA GeForce GT 120
Type:GPU
Bus:PCIe
Slot:Slot-1
PCIe Lane Width:x16
VRAM (Total):512 MB
Vendor:NVIDIA (0x10de)
Device ID:0x0640
Revision ID:0x00a1
ROM Revision:3386
Displays:
Display Connector:
Status:No Display Connected
iMac:
Resolution:1920 x 1200
Pixel Depth:32-Bit Color (ARGB8888)
Main Display:Yes
Mirror:Off
Online:Yes
Rotation:Supported
Connection Type:DisplayPort
I have an ACD LED connected, what am I missing here ?
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Sep 19, 2010
I've got an 08 Mac Pro with a 30" ACD hooked up to it as well as a 24" Apple LED display (via a MDP to (DVI?) converter) and I'm having some problems. Basically, sometimes the screens go black. It can be when the computer turns on, that one (never both) doesn't turn on... or, when waking from sleep, or, one just goes black at some point. I ran TechTool Deluxe on the Mac Pro and the GPU passed the test just fine. FYI The converter is USB powered.
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Oct 1, 2010
My macbook pro 15's screen is dead and I don't want to buy a new one. I've been using it connected to my tv for a while now and the display has started to feel irritating and unnecessary so I wanna get rid of it completely.
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May 3, 2010
I have my TV connected to my computer so when I'm going to watch a movie I drag it over there. But I don't want it like that all the time, for instance when I play games it's really irritating if I drag the mouse to much to the side it goes out to the TV. How do I turn it off? In Linux and Windows it's no problem at all, but in OS X I can't find that option?
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Jun 17, 2014
Every now and again my mac book pro ret display says no connected camera. how do i fix this?
Info:
MacBook Pro with Retina display, iOS 7.1.1
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Apr 6, 2010
I have a 19-inch Envision EN9410e LCD flat panel monitor. Right now I did a mirror display setup. The native resolution of this monitor is 1280 x 1024. When I went to System Preferences to change it to that resolution my LCD monitor shows the Snow Leopard desktop but it's in the middle of two black bars. I had to revert to 1024 x 768 resolution to not have the black bars show. Is there a way I can change it to the native resolution and not have the black bars on the top and bottom show up on the screen?
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Mar 5, 2012
I have a macbook pro purchased last June. Want to connect an external display and the only option is usb. Apple does not make a minidisplay to usb adaptor and I can not find one on line. Computer will not recognize the display connected directly to the usb. What can I do?
Info:
MacBook Pro
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Mar 26, 2012
My Macbook Pro (15 in 2 GHz core i7) absolutely crawls when I plug in the thunderbolt display. I'm running on snow leopard with 4 gigs of memory. Ive made all the neccesary updates. I plug in the screen and close my laptop and the computer gets unbearably slow. Once I open it up it gets way better and when I unplug the display it goes back to 100% speed. Ive called apple and they cant figure it out. Ive taken it to the apple store and they tell me they cant figure it out.
Info:Thunderbolt display, Mac OS X (10.7.3)
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May 9, 2012
I have a late 2011 15" macbook pro running latest lion os that suddenly - when connected to my 24" cinema dislay - speeds up the fan. I have tried to reset both pram and smc, but still it heats up when I connect to the display. What to do?
Info:
MacBook Pro, Mac OS X (10.7.3), 15" Late 2011
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Sep 1, 2009
so i am REALLY new to all this monitor stuff. I have always had "package deals" where I never really needed to worry about the connections on my monitors working.. or i've had imacs. Anyways.. i have a MBP that I would LIKE to have hooked up to an older Apple Studio Monitor. Now, I know that the MBP video card does NOT supply power to the monitor, and that this monitor NEEDS power to come from that cable (the monitor does not have a separate power plug) So i know i need some type of converter that will send power to my monitor.. WHAT IS THIS CABLE??
I have read about the AT-DP200 but the more i read, the more confused I get.. At first i thought it was right.. but then im starting to think this does the opposite.. that its for older computers and newer monitors. or is THIS what i need? I DONT KNOW!! Please point me in the right direction.. I just need to know what will work.. I REALLY want to get this set up..
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Jun 15, 2012
My Mac mini is connected to a Samsung widescreen (1360x768) display using mini port to VGA adapter. When starting, the both sides of the screen is not used, left black. Mac mini thinks the display is a 4:3 display, but does not recognize this as a 16:9 display. What can I do?
Info:
Mac mini, Mac OS X (10.7.4)
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Jun 27, 2012
i currently have my mac mini server Mid 2011 hooked up to my 27' inch apple cinema display and it flickers once a while.
Info:
Mac mini, Mac OS X (10.7.4), Connected to 27' LED Cinema Display
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Aug 14, 2010
After months of an incredibly slow internet connection @ home I finally discovered the problem. I have a MacBook Air 1.6 GHz Intel Core 2 Duo. It can connect to any wireless network at home, school, office, etc. However, when at home I connect my Macbook Air to a 23" Apple Cinema Display (ACD) the internet goes from 1500 Kbps to 60 Kbps. Not believing the reason I have tried it several times and there is no other factor. At home I use a 2701HG-T 2Wire router.
Updates:
1) I do not have a network adapter so I can't know if the same would happen with Ethernet.
2) The problem exists whether with my MBA is opened or closed.
3) I do not change the location of my MBA when I connect it to the ACD.
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