iMac to HDTV = Green Screen? (pictures added).

Discussion in 'iMac' started by TMXX1, Jul 9, 2011.

  1. TMXX1, Jul 9, 2011
    Last edited: Jul 11, 2011

    TMXX1 macrumors newbie

    Jul 9, 2011
    Edit : Pictures added if you scroll down.

    So I went to plug my iMac to the HDTV....

    But the screen is all green...I mean you can see that's it the computer on the screen, but everything is green.

    Also, I tested my TV with my PS3 to see if it was the TV itself, crystal clear picture with the TV, no issue with it.

    I've eliminated the TV from what could be wrong (tested it with the PS3)
    The HDMI cord is brand new and I tested it with the PS3 with no problems
    The new iMac to HDMI cord is brand spanking new

    The screen is still green though. Why??????

  2. simsaladimbamba

    Nov 28, 2010
  3. TMXX1 thread starter macrumors newbie

    Jul 9, 2011
    I know how to connect it...and I have all of the pieces needed, just the picture on the TV is a mess.

    It's a 20" iMac, got it a few years ago.

    How do I fix this though?
  4. MattSepeta macrumors 65816


    Jul 9, 2009
    375th St. Y
  5. TMXX1 thread starter macrumors newbie

    Jul 9, 2011
    Here's what I'm using to connect it with:


    Here's the TV screen after connecting it...


    As you can see, it's not right. And in the bottom right of the picture you can clearly see the iMac's screen is not that color.
  6. TMXX1 thread starter macrumors newbie

    Jul 9, 2011
  7. NutsNGum macrumors 68030


    Jul 30, 2010
    Glasgow, Scotland
    Best case: crap connector.

    Worst case: output from the iMac is broken.
  8. TMXX1 thread starter macrumors newbie

    Jul 9, 2011
    Won't apple charge $100000 to fix it? - can I do it?

    I can try it on another TV...just a pain in the a$$ to move it.
  9. AdrianK macrumors 68020

    Feb 19, 2011
  10. NutsNGum macrumors 68030


    Jul 30, 2010
    Glasgow, Scotland
    If the iMac output is broken, then you're probably not going to be able to sort it on your own.

    Try the other TV, moving the iMac to another room is a lot easier than taking it to an apple store.
  11. Jurpl macrumors newbie

    Jul 11, 2011
    I have exactly the some problem on a Philips 8404, not always but it happens after a while.
    When I disconnect the HDMI on the TV and connect it again it's ok for 10 minutes.
    I'll try a different adapter.
  12. byronseeker macrumors newbie

    Jul 13, 2011
    kind of the same problem, but my colours in the file content playing are greenish

    Hi, I was just wondering if anyone else has this problem.My screen does not go completely green on my led/lcd TV but anything in the file being played seems to swap the red colour spectrum into the green spectrum, eg lips on peoples faces go green/grey instead of pink... and the list goes on.
    It's only just started to happen when i play AVI files using the VLC media player on my MacBook Pro. It doesn't happen when I play purchased media content from the itunes store and was only doing it on my laptop when connected to the tv with new HDMI and convertor cables but now also my flatmates also.
    Any suggestions????
    thank you
  13. InuNacho macrumors 65816


    Apr 24, 2008
    In that one place
    My stupid Mini DVI to VGA cable only shows yellow if it isn't in the right connection. Try flexing it around a bit.
  14. blueroom macrumors 603


    Feb 15, 2009
    Toronto, Canada
    If it's just for movies and such an ATV2 is only $99
  15. olosi, Mar 19, 2012
    Last edited: Mar 19, 2012

    olosi macrumors newbie

    Mar 19, 2012
    Hi All....
    I get the same issue as TMXX1 with a Mac Mini of late 2011....
    Is there any solution like change resolution? Hertz ? or anything else ?
    The Mac Mini 2.5 Ghz with ATI 6630 is connected to Philips LED TV via HDMI cable without converters since this model has a HDMI port.

    Thanks in advance...

    P.s. TMX11 I used your images to post in the right section the same issue I have with the mac mini, I hope this will not bother you. If so please tell me and I delete them.
  16. Jurpl macrumors newbie

    Jul 11, 2011
    Solution for me

    This was the solution that worked for me: (I tried different adapters)

    1. Download

    2. Unarchive it

    3. In the Finder, go to (using cmd-shift-G) the directory /System/Library/Displays/Overrides/

    4. Place the entire directory you unarchived in step 2 (DisplayVendorID-410c) in the directory /System/Library/Displays/Overrides/

    5. Reboot
  17. lostless macrumors 6502

    Oct 22, 2005
    the green could be caused by sending a RGB signal into a device expecting YPbYr. YPbYr is the standard for TV, DVD,s, Ect. See if your TV has a setting to tell what type of input to accept if it can't auto detect.
  18. olosi macrumors newbie

    Mar 19, 2012
    thank you jurpl but what should this process fix ? the mac sending wrong signal over HDMI ?
  19. bungiefan89 macrumors 6502a

    Apr 5, 2011
    *grumble, grumble, grumble* Why don't you try it and let us know if it worked?
  20. Tim in Phoenix macrumors member

    Apr 9, 2010
    That is exactly right. A device called a transcoder will fix your problem but quality transcoders will be over $100, maybe more.

  21. Jurpl macrumors newbie

    Jul 11, 2011
    I don't know but it fixed my green screen problem :)

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