Macbook will not detect external display

Was using a $7 aftermarket minidisplay port to HDMI cable with success for about 2 months with no problems detecting external display.  Started having problems (it would randomly detect until it eventually would not at all) and tried all solutions I could find in discussion boards to no avail.  I recently bought a $40 cable from the apple store and it worked fine for about a month and now it only recognizes my external display about 50% of the time (which is how the problem began the first time).  Very frustrating!  What is the deal here? 

Did you have any luck resolving this? I have had exactly the same issue when updating the EFI Firmware to Version 2.8 (the latest for a Mid-2013 MacBook Air 6.2 model) - MBA61.0099.B12
I've tried flushing the NVRAM/PRAM and also resetting the SMC but no joy. I'm trying to drive an AOC Q2963 monitor using a display port connector. Annoyingly, I don't think there's a way to rollback to a previous firmware version.

Similar Messages

  • Macbook Pro not detecting external display

    I can't seem to make this work. I'm using a MiniDP-DVI cable which is plugged into an DVI cable plugged into an external monitor. I know it works because I have tried it on other computers and it has worked on the Macbook (erratically).
    I've reset the PRAM several times and it has not fixed the problem. I did it in this order:
    1. Remove adapter from computer
    2. Shutdown
    3. Press Option Command P R until the second chime is heard.
    4. Log on as usual
    5. Reconnect adapter to MBP
    This is what the system log states when I plug the adapter in:
    Oct 27 20:47:01 SMBP.local WindowServer[80]: Received display connect changed for display 0x42732c0
    Oct 27 20:47:01 SMBP.local WindowServer[80]: Created shield window 0x66 for display 0x042732c0
    Oct 27 20:47:01 SMBP.local WindowServer[80]: handle_will_sleep_auth_and_shield_windows: no action for lock state 1
    Oct 27 20:47:01 SMBP.local WindowServer[80]: Received display connect changed for display 0x3f003d
    Oct 27 20:47:01 SMBP.local WindowServer[80]: Received display connect changed for display 0x3f003e
    Oct 27 20:47:01 SMBP.local WindowServer[80]: Received display connect changed for display 0x3f003f
    Oct 27 20:47:02 SMBP.local WindowServer[80]: Display 0x042732c0: GL mask 0x1; bounds (0, 0)[1280 x 800], 9 modes available
              Main, Active, on-line, enabled, built-in, boot, OpenGL-accel, Vendor 610, Model 9ccb, S/N 0, Unit 0, Rotation 0
              UUID 0x0000061000009ccb00000000042732c0, ColorProfile { 3, "Color LCD Calibrated 2012-06-28"}
    Oct 27 20:47:02 SMBP.local WindowServer[80]: GLCompositor: GL renderer id 0x01024301, GL mask 0x0000000f, accelerator 0x00004333, unit 0, caps QEX|QGL|MIPMAP, vram 451 MB
              texture units 8, texture max 8192, viewport max {8192, 8192}, extensions FPRG|NPOT|GLSL|FLOAT
    Oct 27 20:47:02 SMBP.local WindowServer[80]: Display 0x003f003f: GL mask 0x8; bounds (2304, 0)[1 x 1], 1 modes available
              off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 3, Rotation 0
              UUID 0xffffffffffffffffffffffff003f003f
    Oct 27 20:47:02 SMBP.local WindowServer[80]: Display 0x003f003e: GL mask 0x4; bounds (2305, 0)[1 x 1], 1 modes available
              off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 2, Rotation 0
              UUID 0xffffffffffffffffffffffff003f003e
    Oct 27 20:47:02 SMBP.local WindowServer[80]: Display 0x003f003d: GL mask 0x2; bounds (2306, 0)[1 x 1], 1 modes available
              off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 1, Rotation 0
              UUID 0xffffffffffffffffffffffff003f003d
    Oct 27 20:47:02 SMBP.local WindowServer[80]: Created shield window 0x68 for display 0x042732c0
    Oct 27 20:47:02 SMBP.local WindowServer[80]: Created shield window 0x69 for display 0x003f003f
    Oct 27 20:47:02 SMBP.local WindowServer[80]: Created shield window 0x6a for display 0x003f003e
    Oct 27 20:47:02 SMBP.local WindowServer[80]: Created shield window 0x6b for display 0x003f003d
    Oct 27 20:47:02 SMBP.local WindowServer[80]: Display 0x042732c0: MappedDisplay Unit 0: Startup Mode 1280 x 800, CGSThirtytwoBitColor, Resolution 1, IOMode 0x80000000, IODepth 0x0, IOReturn 0x0
    Oct 27 20:47:02 SMBP.local WindowServer[80]: Display added
    Oct 27 20:47:02 SMBP.local WindowServer[80]: Display removed
    Oct 27 20:47:02 SMBP.local WindowServer[80]: Display 0x042732c0: GL mask 0x1; bounds (0, 0)[1280 x 800], 9 modes available
              Main, Active, on-line, enabled, built-in, boot, OpenGL-accel, Vendor 610, Model 9ccb, S/N 0, Unit 0, Rotation 0
              UUID 0x0000061000009ccb00000000042732c0, ColorProfile { 3, "Color LCD Calibrated 2012-06-28"}
    Oct 27 20:47:02 SMBP.local WindowServer[80]: GLCompositor: GL renderer id 0x01024301, GL mask 0x0000000f, accelerator 0x00004333, unit 0, caps QEX|QGL|MIPMAP, vram 451 MB
              texture units 8, texture max 8192, viewport max {8192, 8192}, extensions FPRG|NPOT|GLSL|FLOAT
    Oct 27 20:47:02 SMBP.local WindowServer[80]: Display 0x003f003f: GL mask 0x8; bounds (2304, 0)[1 x 1], 1 modes available
              off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 3, Rotation 0
              UUID 0xffffffffffffffffffffffff003f003f
    Oct 27 20:47:02 SMBP.local WindowServer[80]: Display 0x003f003e: GL mask 0x4; bounds (2305, 0)[1 x 1], 1 modes available
              off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 2, Rotation 0
              UUID 0xffffffffffffffffffffffff003f003e
    Oct 27 20:47:02 SMBP.local WindowServer[80]: Display 0x003f003d: GL mask 0x2; bounds (2306, 0)[1 x 1], 1 modes available
              off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 1, Rotation 0
              UUID 0xffffffffffffffffffffffff003f003d
    Oct 27 20:47:03 SMBP.local WindowServer[80]: **DMPROXY** (2) Found `/System/Library/CoreServices/DMProxy'.
    Oct 27 20:47:03 SMBP.local WindowServer[80]: Display 0x042732c0: MappedDisplay Unit 0; ColorProfile { 3, "Color LCD Calibrated 2012-06-28"}; TransferTable (256, 3)
    Oct 27 20:47:04 --- last message repeated 1 time ---
    Oct 27 20:47:04 SMBP.local WindowServer[80]: **DMPROXY** (2) Found `/System/Library/CoreServices/DMProxy'.
    Oct 27 20:47:04 SMBP.local WindowServer[80]: Display 0x042732c0: MappedDisplay Unit 0; ColorProfile { 3, "Color LCD Calibrated 2012-06-28"}; TransferTable (256, 3)

    I had the exact same behavior and log and I solved the issue by replacing the MiniDP-DVI adapter. I tried the "broken" adapter on another set of laptop+display and it was working there, so that made me think the adapter was ok, when apparently it was not.

  • Late 2008 15 inch Macbook Pro will not detect external projector

    I have a Toshiba projector that I am trying to hook up to my Macbook Pro for a presentation tomorrow. The computer will not detect the display. I'm using a DVI cable connected to the Mini Display Port. I know I've got the projector on the right input as my white Macbook with mini DVI will detect it but not display it properly (all green).
    I've tried shutting down and disconnecting and everything. I need this to work asap.

    Have you checked the screensaver and power settings, sleep display etc in the System Preferences?
    You can throw this mega cocktail at it, see if it cleans up your problem.
    Download the free OnyX here
    http://www.titanium.free.fr/
    Run ALL the maintainence and cleaning aspects, , especially the caches, you can cancel the reboot in between.
    Finially run the Verify > Preference file check/repair and then reboot.
    This should clean out all your caches and whatnot.
    Then look at this support article about resetting the SMC/PRAM
    http://support.apple.com/kb/ht3964
    http://docs.info.apple.com/article.html?path=Mac/10.6/en/26871.html

  • Thinkpad Edge S430 - Windows does not detect external display connected via HDMI

    On a Thinkpad S430 with HD4000 integrated graphics, an external display connected via a HDMI cable is not detected at all when using Windows. The system is fully updated as of the time of posting this message, both via the Lenovo Update tool as well as Windows update.
    The Intel driver version is 8.15.10.2696. It appears that this is the latest version, since it does not offer an update when I try to auto-update it via Device Manager.
    NB: I am running Ubuntu 12.04 with kernel 3.4.0 on the same machine, and the external display works perfectly fine with this software configuration.
    Hence I think that it's very likely that this is a Windows-specific driver issue.
    Would Lenovo happen to have a driver update in the works? Alternatively, I will be thankful for any suggestions about possible resolution of this problem.

    skn2011 wrote:
    My Macbook Pro notbook 13.3" does not detect external display throught it's mini display port to HDMI connector when connected to Sony Bravia 32" LCD TV.Can anyone help me get the answer as i tried reading everywhere on internet and none does not seems to work.Please help me out guys.
    Are you using the Apple adaptor or a 3rd party

  • Before I updated today to Lion OS, my multiple monitors worked fine. Now my macbook will not detect them.  Is there a solution for this?

    I've been running multiple monitors for over a year on my Macbook.  Updated today to Lion OSx and well Steve, it didn't just work.  My macbook will not detect my three external monitors, and after scouring the last hour on Google of how to remedy this and trying the basic suggestions of restarting, unplugging, replugging, to no avail.  Anyone else have a similar problem since they've upgraded to Lion OSx?

    karl219 wrote:
    1-Time machine seems to be coming up often in the discussions.If my backup is on my external hard drive, why would space be taken up on my macbook hard drive?
    Read the first extract for the definition of backup snapshots and how they are handled by the OS.
    2-Shoud I delete older backups? If for example, all I need from Time Machine is the latest backup done today, can I get rid of the 2+ yeras of backups, or do they not take up that much space?
    No.  Time Machine should be on a separate HDD and will take care of deleting backups when necessary on that drive.
    3-Back to the issue, considering I don't have access to a an apple store for the next few months, what is my best plan of action?
    I would consider installing a larger internal HDD.  Capacities to 1 TB are now available.
    4-I am considering buying a new macbook 15inch, and get more space, however, I'm scared that the same problem will happen again. Is this common on all macs? Will using Time Machine to "Restore" my backups bring along the issues as well?
    All Macs using Time Machine will experience the same conditions.  The problem is that many users do not under stand what 'Other' is and that leads to confusion.  There are many essential OS files in that category that should not be touched as well as some user files.  The issue is not to reduce 'Other' as such, but reduce the total amount of data on the HDD if space is becoming a premium.
    Please read these two extracts:
    http://pondini.org/OSX/LionStorage.html
    http://pondini.org/OSX/DiskSpace.html
    Ciao.

  • Macbook will not detect projector?

    Macbook will not detect projector?

    Just had problems today and spent an hour with an Apple tech. Gave up, called Dell (India) gave up.  Rebooted computer and low and behold it worked.  That after trying just about everything and being totally convinced that the problem had to be with the projector.  So if all else fails, reboot.

  • My imac will not detect external monitor after recent update. Is there a way to fix this?

    I have a VGA monitor plugged in to my imac using the VGA adapter to the mini-DVI.  All was working well.  Since I updated over the weekend, the computer will not detect the monitor.
    Any ideas how to fix this?

    Pcantin wrote:
    I have tried another VGA monitor and that failed as well.  Since you don't think the update was the cause, it may be that the adapter I am using decided to call it quits.  I will see if I can find another and test that out.
    I will look into the external drive idea as well.
    Thanks for your help on this.
    I didn't think about the adaptor, but you should at least visually inspect both the adaptor and the cable at both ends. If one or more pins got bent even slightly the connection might fail. The cables can also fail internally. Replacing the adaptor and cable may be the quickest thing to do initially. If you want to try to save money, first replace the adaptor, and if the problem persists, then go replace the cable (or vice versa).

  • Hello Apple Fix the display issue.  MAcbooks suddenly stop detecting external display!!!

    Bought another new minidisplay to HDMI and suddenly stopped detecting external display!   However, it works randomly with no rhyme or reason.  I have tried everything.

    No answer

  • Macbook won't detect external display anymore - Random shutdown injury??

    Hi,
    my Macbook has the dreaded random shutdown thing happening, often it can't even get through the startup sequence. If I reset the PMU and PRAM and check the disk every week I can keep it running. Applecare are making not particularly helpful suggestions like "run it in safe mode" - hello people, random means it can take days to happen again... I use this computer for work so I need it at full capacity every day!!!
    Anyway, enough angry ranting. The casualty of today's RS and subsequent PRAM PMU resetting is my external display (Viewsonic LCD). The macbook is no longer sending signals to it (display says "no signal"). When I ask the macbook to "detect displays" nothing happens. I have restarted the macbook several times and unplugged and replugged the display connection it doesn't help. Yes, I have the AC power cable plugged in on the Macbook (I know it doesn't like talking to the screen if I don't).
    The display and macbook have always worked fine together in the past...
    Does anyone have any suggestions on how to test for causes or fix this display related problem?
    MacBook   Mac OS X (10.4.8)  
    Powerbook G4   Mac OS X (10.4.2)  

    You don't mention ever having brought the problem to Apple's attention, or what resulted from your request for Apple's help with it. This isn't a universal or widespread problem. It may be a hardware fault in your own equipment that needs to be resolved with a repair, or it may be a software problem (corrupt file, incompatible software conflict, update needed, etc., etc.). You seem to think Apple should have fixed it for you without your lifting a finger, and you're eager to complain about Apple's lack of support. But you've offered nothing to indicate that Apple even knows you need support. You do have to ask for it. Have you done so?
    We have no idea what steps you've taken to try to narrow down the possibilities, e.g., making sure the monitor is turned on; trying a different video cable as iVmichael has suggested; testing the monitor with the same cable on a different computer; testing a different monitor with the same cable and then with a diferent cable on your computer; substituting a different cable adapter, if you are using one; applying all applicable system software updates and then Repairing Permissions and Repairing Disk; starting in Safe Mode and seeing whether the monitor is recognized and activated then; seeing whether the monitor is detected in System Profiler; and so on. You may have done some of these things, but you haven't told us about them or about the results.

  • MacBook no longer detects external display

    When I hook my computer up in my home office I connect an external display using the Apple VGA dongle.
    Previously, when I inserted the dongle the display would blank out for a moment while detecting the display, then reappear with the VGA output enabled. This is no longer the case. When I insert the dongle, my screen doesn't blank out, and the VGA output will not enable. Its like it doesn't even know I'm inserting the dongle.
    I have inspected the dongle for broken pins and dirt, but it appears to be making a good connection.
    Is there something wrong with my Mac, or is it the dongle? Is it worth taking this to a genius bar in hopes they can try a different dongle, or shed some light on the situation? Thanks in advance.

    Try plugging the display in and then going to System Preferences>Displays and clicking the "Detect Displays" button.

  • Not detecting external display after waking up MBP from sleep mode

    I am a recent owner of a MBP and enjoying it. However, one problem that I can't seem to find a solution to is the external display problem after sleep mode.
    When I first boot up the Mac and plug in my Dell external monitor via the mini adapter, there is no problem with detection or display. However, every time I put the MBP in sleep mode and then wake it up again, the external monitor does not "wake" up and my MBP only displays my normal screen on the Mac.
    I tried to 'Detect Displays' to no avail and the only solution is unplugging the mini connection and plugging it back into the MBP for the MBP to re-detect the external monitor.
    Although this is a quick fix in itself, I do not want to wear out the mini port by doing this every timeI come out of sleep mode. Any solutions so that the external monitor will detect the MBP waking up from sleep and display properly? Thanks!

    And same problem here.
    Using a MBP 2.66 i7 with a Dell 3008WFP that's connected to the MBP through DisplayPort. It works some of the time but once in a while (only been using the new MBP for a couple of days now) the monitor won't come out of sleep mode. Turning it off/on causes OS X to completely ignore the monitor. I was able to get this setup to work again by pressing 'Detect Displays' in the System Preferences pane but most of the times that doesn't help. The only sure way to get the monitor working again is by booting into Windows through Bootcamp, Windows is able to use the monitor, if I reboot after that OS X sees the monitor again.
    Also saw a magenta line/stripe on the left side of my monitor and the monitor sometimes makes a buzzing sound when connected to the MBP through DisplayPort. That's what you get by using bleeding edge tech I guess :\ Only alternative is buying the mini-DP to dual-DVI connector but paying $99 just to be able to use an external monitor is rather insane. Besides that lots of users are having problems with this adapter.

  • Macbook Air stopped detecting external displays

    My MBA (Mid 2011) has stopped detecting ANY external display. Have tried different leads (MDP > HDMI and VGA) with no luch, My MBA (Mid 2011) has stopped detecting ANY external display. Have tried different leads (MDP > HDMI and VGA) with no luck. It seems to have happened since I have updated to Mountain Lion a few days ago.
    Has anyone had similar problems?

    You should also ask this in the MacBook Air forum. This is the forum for the white and black plastic MacBooks that were discontinued in 2010. You should also post this question there to increase your chances of getting an answer.
    https://discussions.apple.com/community/notebooks/macbook_air
    And the Mountain Lion Forum https://discussions.apple.com/community/mac_os/os_x_mountain_lion

  • MBP not detecting external display

    I encountered a strange problem today when I tried re-connecting my external monitor: it is not being detected by OS X.
    I tried everything I could think of; I selected "detect displays" in preferences, I restarted the computer, I dis- and re-connected everything, I reset the PRAM, I tried connecting to a different monitor, and nothing seems to work. When I disconnect and reconnect the DVI cable, the laptop's screen flashes blue like it normally does, but nothing appears on the external monitor's screen. For the record I'm using the Dell 2209WA, and I haven't had any problems like this yet.
    If anybody has any other suggestions as to what I should try doing, please let me know. Thanks!

    Hey all, did a software update on my partner's mbp yesterday (10.5.8, security update 2009-006) and had the same thing happen where our external viewsonic display was no longer being detected. Plugging the cable in and out of the mini display port had the same effect already mentioned here where the mbp screen flashed blue like it was about to recognise the external display, but then nothing. Selecting detect displays from display preferences also had no effect. Tried resetting the PRAM and also the PMU, still nothing. So I shut down the mbp; disconnected the mini display cable; then turned off the viewsonic monitor at the power outlet and left it off for 10-20 seconds. Then I turned the viewsonic's power outlet back on, started up the mbp, turned the monitor on and plugged the mini display port cable in and the external display was back and working properly. Have shut down/restarted numerous times since then and it's all still working normally. Not quite sure how/why this busted in the first place, or why turning the viewsonic off at the power outlet seems to have fixed it, but it might be worth a shot for those experiencing similar problems... and it sure beats having to install/reinstall a different os version (which was going to be my next option)!

  • HDCP error on MacBook Air (NOT using external display)

    I just downloaded a HD (720p) movie through iTunes, and cannot play it on my Mac becuase of a HDCP non-compliance error.  I am running it directly on my MBA, not through an external display... I would have thought the MBA integrated display would be HDCP compliant!  Is this an error or am I wrong in assuming my MBA could play legally purchased HD movies?

    Try a System Management Control reset (SMC)
    Whilst the machine is plugged into power, Hold down the left side shift control and option buttons at the same time as the power on button.
    Hold these down for 4 seconds and relese all at the same time.
    If this fails then you may need to clear the caches folder for your user too.

  • Not Detecting External Display - 24" Gateway FPD2485W

    Hi everyone,
    I'd really appreciate any help I can get on getting my monitor to display at 1920x1200.
    My setup:
    Mac Book Pro 2.2Ghz
    4Gb memory
    128 M video memory - NVidia GeForce 8600M GT Memory Card
    OSX - 10.5.2
    Bios - MBP 31.0070.B05
    External Display - 24" Gateway FPD2485W
    What I've tried... all manner of plugging in the display, then booting up, then laptop then powering up display. I've applied the latest bios. I've run apple-opt-P-R at startup.
    I haven't yet been able to get it to detect this display. Can anyone confirm that the 128M card can handle the local display plus a 1920x1200 display? From what I've read, I believe this is possible. Anybody got any other suggests for me to detect the monitor and set a display resolution higher than 1440x900?
    Thanks,
    Alan

    Hi Mac Wise,
    Thank you for your response.
    I am using the DVI connection and it displays normally, but just can't detect the monitor. It gives me the default 15" MBP resolutions... do you get different behavior? I can't go higher than 1440x900.
    Thanks,
    Alan

Maybe you are looking for