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  1. #1

    Member Since
    Jan 18, 2011
    Macbook Pro stops detecting external display.
    So recently I purchased a third party Mini Displayport to HDMI cable from eBay. It worked on two separate HDTVs at first, (Sony Bravia and a Samsung).

    However it suddenly stopped detecting after I swapped the HDMI slots on my Sony Bravia and now it won't work on anything.

    When I try to connect the Macbook Pro to the TV all I get is a blue flash on the Macbook Pro and the TV is unchanged. Going to Display preferences doesn't do any justice either because the TV is just not being detected.

    I also went to JB HiFi and purchased a Moshi MDP to HDMI cable just to check if it was because of the first cable, but it still doesn't work. So I got my refund.

    The HDMI cable works perfectly as I use it with my Xbox 360.

    I've tried so many things and searched everywhere on the internet but to no success, hence registering to this site.

    Hardware Overview:

    Model Name: MacBook Pro
    Model Identifier: MacBookPro5,5
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.53 GHz
    Number Of Processors: 1
    Total Number Of Cores: 2
    L2 Cache: 3 MB
    Memory: 4 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MBP55.00AC.B03

  2. #2

    RustProofCorn's Avatar
    Member Since
    Feb 21, 2010
    I have had the same problem it was the mini display to hdmi that went bad. Changed it out and viola back up and going.
    60% of the time it works every time.

  3. #3

    Member Since
    Jan 18, 2011
    Yeah, I changed it to a Moshi one, which costed like 49 dollars, yet still didn't work.

  4. #4

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Keller, Texas
    2017 27" iMac, 10.5" iPad Pro, iPhone 6s+, iPhone 7+, Numerous iPods, High Sierra
    You may have confused your MBP when you swapped ports. It shouldn't have happened but..... Let's try resetting the PRAM/NVRAM. And if possible, reset the TV(s) to their default settings via the menu.

  5. #5

    Member Since
    Jan 18, 2011
    Resetting the NVRAM and PRAM didn't work.
    But thanks for the input.

  6. #6

    Member Since
    Feb 07, 2011
    I am having the same issue. I have a third party mini display port to vga and it worked fine until recently. It stopped detecting my external display and now my mbp flashes a blue screen and the display is never detected. can someone help please?

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