MatiasDemetrio
Level 1 (0 points)

Q: MBA doesn't detect external monitor

Hi, 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.

MacBook Air (13-inch Mid 2012), Mavericks 10.9.4

Posted on Sep 8, 2014 12:36 PM

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MatiasDemetrio

Q: MBA doesn't detect external monitor

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  • by mario49,

    mario49 mario49 Sep 10, 2014 7:23 AM in response to MatiasDemetrio
    Community Specialists
    Sep 10, 2014 7:23 AM in response to MatiasDemetrio

    Hey MatiasDemetrio,

     

    Thanks for the question. After reviewing your post, it sounds like you are having difficulty using an external monitor. I would recommend that you read this article, it may be able to help you resolve or isolate the issue.S

     

    Apple computers: Troubleshooting issues with video on internal or external displays

    http://support.apple.com/kb/HT1573

    No video or no signal, image distortion, "snow," or flickering

    Check connections

    When using an external display be sure to check the following:

    1. If you're using an Apple notebook, confirm the AC power cable or adapter is securely connected to the computer and the cable providing power to the display is also secure. It is always good to have your notebook connected to AC power when an external display is in use.
    2. Confirm display adapters are fully seated in their respective connections and that they are supported models and for the computer and display. Refer to these articles to assist you with adapter compatibility and further configuration information:
    3. Remove all display cable extenders, KVM switches, or other like devices and retest to determine if the issue is resolved.
    4. Try unplugging the video adapter or cable and then plug it back in.
    5. If more than one video adapter is in use (or "daisy-chained"), troubleshoot by using only one adapter.
      • Example: A mini DisplayPort to DVI adapter connected to a DVI to HDMI adapter is an unsupported configuration because there is a series of adapters in use.
    6. If available, try using a different display and or adapter (or use a different connector by using DVI instead of VGA, for instance).

    Reset the system

    You can reset the Mac's parameter RAM and SMC.

    Reset the resolution

    Start by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:

    1. Start up in Safe Mode.
    2. From the Apple () menu, choose System Preferences.
    3. Choose Displays from the View menu to open the preferences pane.
    4. Select any resolution and refresh rate that your display supports.
    5. Restart your computer.

     

    Thanks for using Apple Support Communities.

    Have a nice day,

    Mario

  • by MatiasDemetrio,

    MatiasDemetrio MatiasDemetrio Sep 11, 2014 9:08 AM in response to mario49
    Level 1 (0 points)
    Sep 11, 2014 9:08 AM in response to mario49

    Hi Mario,

    Thanks a lot for your reply!

    I've tried all the processes and neither worked.

    Today I changed my Mini Display Port to HDMI for a Mini Display Port to VGA and until now that's working well (I had to adjust the display resolution to 1600x900)

    Hope this helps to other members of the community.

    Have a nice day

    Matias