Previous 1 29 30 31 32 33 Next 984 Replies Latest reply: Jan 24, 2016 8:21 AM by bach315 Go to original post Branched to a new discussion.
  • dbyrd92 Level 1 (0 points)

    Did you try both HDMI channels? Cause there's usually 2 HDMI ports plug it in and then try the other input if it says no signal.

  • Gil Man Level 1 (0 points)

    I did try both. Any other suggestions?

  • Maciej Samsel Level 1 (45 points)



    Do it in proper sequence. I am really upset by those posts and product reviews: "mine stopped working after 5 times". They simply do not follow procedure. Routine kills.


    1. Power on.


    2. Attach DisplayPort converter cable to Thunderbolt output.

    3. Search for display (if it did not find already).


    In fact I had my TV hooked up first to the conversion dongle and then after powering up my Macbook Air I connected cable to the output. Lion seem to have discovered my big TV with no problems. In fact it nicely reported "Sony...".


    I use some cheap DP-to-HDMI converter from some store ($9.99)... not near prices in some other stores for "quality product".


    I think people assume that any order is adequate. Well not true.

  • jamielfromirvine Level 1 (0 points)

    I have figured out how to make it work. Under "System Preferences" go to Display. Then when that window opens, be sure to mark the check box in the lower left hand hand corner labeled "Show Displays In Menu Bar."


    You should see an TV monitor in your system try in the top right corner of your computer screen. Click on the TV display then click "Turn On Mirroring". Once this happens your screen should appear on the TV monitor its connected to. But the picture may seem a little scretched. So you will need to click on the TV icon in the system tray again, scroll down the bottom and choose from one of the resolution options displayed. Im currently using 1200x800 and it works fine.


    I hope this helps. This works 100% of the time.

  • Jimmy Smash Level 1 (0 points)

    Hi, i've tried most of the things on here but i'm a bit stuck now so after suggestions...


    My Macbook Pro has always connected fine to my Samsung tv that I have in one room but recently I used it on a Panasonic tv in a different room. Now I can't get it to work back on the Samsung tv, it is definitely being recognised because Samsung is coming up as a sound output option but it is saying 'no signal' on the screen. I've tested it back on the Panasonic tv and it works fine so there can't be a problem with the cables.


    I've tried resetting the VRAM (if that is the right name!), tried all the different resolutions, mirroring on and off etc but nothing. HELP!


    Thanks in advance.

  • jussuf Level 1 (0 points)

    Hi guys,

    i've got th latest 2011 macbook pro and i bought at gravis an official thunderbolt (or MDP i dont know whats the diffrence) to hdmi adapter and a hdmi cable from the apple store to connect my macbook to my samsung LCD TV.

    I got the same problem as you, i plug i unplug i try it in each possibility but the only thing happens is that my macbook screen turns blue for a secound and thats all. my tv says no signal, no matter what.
    thats just crap, gotta say this is the first time i'm really disappointed of apple perfomance.

  • Maciej Samsel Level 1 (45 points)

    Have you tried this with power supply or without one?


    Thunderbolt is powered interface. I think that MacBook battery may not be enough for some reason (even thougt TV does not have anything to do with power on MacBook). I noticed some loud fan sound as soon as I connected my MacBook Air to TV via Thuderbolt and macBook was getting significantlu warmer than usually.

  • tyso54 Level 1 (0 points)


    I have spent quite some time reading through this discussion and trying all the suggestions but have had no luck at all.


    We have tried to connect both our iMac and Macbook pro via minidisplay to HDMI to our new LG HDTV.

    The TV reads as no signal and neither computer has any response. No flickers or blue screens, nothing comes up under display options in preferrences


    We have tried our other smaller new Sony TV with no luck, also tried connecting to the main TV via HDMI to our Pioneer AV reciever.


    Any other suggestions?

  • lisafromny Level 1 (0 points)

    have a mini mac using hdmi to dvi which works perfectly. however when i try to connect a second monitor using the mini port to dvi there is no signal on that monitor and the monitor with the hdmi to dvi switches off and then comes back with a blue screen. also if i use one monitor and connect the miniport to dvi there is no signal.

    my connections are authentic mac.

  • fhagey Level 1 (0 points)

    I'm having similar troubles.  I have an early to mid 2011 17" MBP i7 with thunderbolt and an AMD Radeon 6750M and an Intel HD Graphics 3000.  I'm trying to connect it to a Samsung P2770FH monitor using a 10 foot Kanex MiniDisplay-to-HDMI cable.  It all works fine at 720p (the resolution is too low to work effectively, but at least it works), but when I set the display preferences to 1080i it works but is fuzzy and blurry.  It isn't something you'd want to work on all day.  When I set the display preferences to 1080p the display gets all clean and crisp, but the bottom 2/3 of the screen flickers and gets all snowy/staticy. This is really something you can't work with.


    What is weird is that when I connect my late 2009 15" MBP Intel Core 2 Duo with MiniDisplay and an Nvidia GeForce 9400M to the Samsung P2770FH with the Kanex MiniDisplay-to-HDMI cable I get clean and cripsy 1080p video on the display.  No Snow, no static, just perfect 1080p resolution.


    FYI: I've also tried using a MiniDisplay-to-DVI adapter and a DVI cable, but that just plain flat didn't work on either machine.  The display would stop actively switching through available inputs when using the DVI cable, but it would say NO INPUT SIGNAL on the Samsung P2770FH.


    Mabe it is something like this that is the trouble:


    My next thing is to use the gfxCardSatus app to select between the AMD Radeon HD6750M and Intel HD Graphics 3000 when using the MiniDisplay-to-HDMI with the 2011 17" MBP i7.

  • MikeSOR Level 1 (0 points)

    I have read so many posts about this and I feel like I know less what to do than before.  I just wish apple would have more straight forward resources we could purchase like this:


    I've spend so much time tyring to figure this out!  Ahhhhhh!

  • fhagey Level 1 (0 points)

    Here is a video I posted to YouTube of what the 1080i output looks like on both machines.


  • fhagey Level 1 (0 points)

    Sorry I meant 1080p.

  • bluefire01 Level 1 (0 points)


    you are a star my son PERFECT


    so plug in the DP adapter and connect to HDMI cable (i was getting a blue screen flash then my apple desktop was showing on my TV but nothing else) even when i opened something up on laptop ?

    so i read Jamies idea

    switched on the Show displays in menu bar and then clicked turn on mirroring


    your a star pal


    IM IN !!!!!!!




  • Steeler Dave Level 1 (0 points)

    I bought a cheapy on ebay and I went to system prefernce, hardware, display, mirror display. Solved the problem  Hope this helps

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