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Apple Notebooks Apple's notebook computers including MacBook Pro, MacBook, MacBook Air, PowerBook, and iBook.

Macbook Pro stops detecting external display.


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Raecyst

 
Member Since: Jan 18, 2011
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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
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RustProofCorn

 
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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.
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Raecyst

 
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Yeah, I changed it to a Moshi one, which costed like 49 dollars, yet still didn't work.
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chscag

 
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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.
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Raecyst

 
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Resetting the NVRAM and PRAM didn't work.
But thanks for the input.
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xlene

 
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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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