MacBook Air 2012 Mini DisplayPort not working with HDTV

Discussion in 'MacBook Air' started by ryansebiz, May 22, 2013.

  1. ryansebiz macrumors member


    Apr 7, 2008
    I'm trying to connect my 2012 11" MacBook Air to my Panasonic p60st60 1080p plasma HDTV using a new Monoprice Mini DisplayPort to HDMI adapter & 6' HDMI cable.

    My TV displays a "No signal" message and my Mac does not show a secondary display option under System Preferences > Displays. I thought it was a handshake issue so I turned off the TV and Mac, turned on the TV, turned on the Mac, but the problem persists.

    Any ideas to get this working? Thank you.
  2. kemperman macrumors regular


    Jul 15, 2009
    Pretty sure you need a thunderbolt to hdmi. Not mini displayport.

    That should fix the problem
  3. PBG4 Dude macrumors 68020

    PBG4 Dude

    Jul 6, 2007
    I use a mDP to HDMI with my 2012 MBA with no issues. It's the $35 adapter sold at the Apple store though.
  4. Verix macrumors regular

    Jul 30, 2010
    Try shutting down, insert the cables, boot up. If it doesn't work, reboot with the cables plugged in (and the TV on the correct input of course). If there's no signal getting through there's something wrong.
  5. old-wiz macrumors G3

    Mar 26, 2008
    West Suburban Boston Ma
    I avoid the monoprice cables; they tend to either not work or work poorly.
  6. DisplacedMic macrumors 65816

    May 1, 2009
    i have had the exact opposite experience
  7. ritmomundo macrumors 68000


    Jan 12, 2011
    Los Angeles, CA
    I have a similar problem with my 2010 11" MBA. I don't get any signal on my HDTV when I plug in my mDP-to-HDMI cable. The TV actually flickers a lot (black and white) when I turn on the mirror image setting. I have a newer 2012 MBP and an older 2008 MBP, and it works perfectly fine with both machines, using the same cable, same settings, same TV. I don't know what the issue is.
  8. Outrigger macrumors 68000


    Dec 22, 2008
    no, thats not how it works.
  9. B... macrumors 68000


    Mar 7, 2013
    MiniDisplay port is old Thunderbolt, which is backwards compatible to MiniDisplay Port.
  10. eduardrw macrumors 6502

    May 20, 2013
    You are using an non apple adapter?

    HDMI TV's are also sometimes very fickle and may not recognize the laptop / HDMI adapter.
  11. heelsbigc macrumors member

    Jan 13, 2011
    Short Pump, Va
    I've been through a week of connection problems with my mba and tv. It can be really random what works and won't and what fixes the problem.

    Try it on another tv.

    Try another cable and/or another adapter.

    Try connecting to the same tv with another type of cable (vga or dvi) Strangely enough, this is actually what "fixed" my issue. VGA wouldn't work, changed to hdmi and it worked, reconnected the vga and it worked again.

    These machines are very flakey (the TVs and the computers). Keep trying, something will eventually work.
  12. ryansebiz thread starter macrumors member


    Apr 7, 2008
    That worked! Very flaky indeed. Thank you.

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