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

MacBook Pro no longer connects to TV via HDMI


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Ally2098

 
Member Since: Apr 05, 2012
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Hi, we used to be able to connect our MacBook Pro to our TV via the HDMI port.

A few days ago my husband took it into work to use for a presentation there, plugged it into some projector-control console type thing there (sorry, I don't have any further details of what it was), and now it no longer works at home - when we plug it in, the Mac's screen appears briefly on the TV but then flickers, scrambles and then disappears within a few seconds. It looks almost as if it's a faulty connection, but plugging another mac into the same lead works perfectly. Also, if we change the display settings to 480p resolution, it does work, but looks a bit weird.

This is a 13" 2011 MBP, 2.3GHz, Intel Core i5, 4GB memory, running Lion 10.7.3.

Any thoughts gratefully received. All backed up - do you think if we were to roll-back to pre all this it would fix it? If so, any help / tips on how to do it would also be great.

Thanks,

Ally
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CodeSamurai

 
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Hello!

You might have already done this, but try keeping the HDMI connection and restarting the Mac. I had to do this once with my TV and it fixed the problem (hasn't showed up again).

Other than that, have you tried clicking "detect displays" under the display options. I've had to do this a few times with older monitors at work.

Take care,
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patoss92

 
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Quote:
Originally Posted by Ally2098 View Post
Hi, we used to be able to connect our MacBook Pro to our TV via the HDMI port.

A few days ago my husband took it into work to use for a presentation there, plugged it into some projector-control console type thing there (sorry, I don't have any further details of what it was), and now it no longer works at home - when we plug it in, the Mac's screen appears briefly on the TV but then flickers, scrambles and then disappears within a few seconds. It looks almost as if it's a faulty connection, but plugging another mac into the same lead works perfectly. Also, if we change the display settings to 480p resolution, it does work, but looks a bit weird.

This is a 13" 2011 MBP, 2.3GHz, Intel Core i5, 4GB memory, running Lion 10.7.3.

Any thoughts gratefully received. All backed up - do you think if we were to roll-back to pre all this it would fix it? If so, any help / tips on how to do it would also be great.

Thanks,

Ally
Hi,

I am having the same issue...For no reason the screen sharing stop working from my MAcbook pro to my Samsung TV, it was working fine for years and I did not do any updates or anything but it stoped working...

Did you find a solution?
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Partridge

 
Member Since: May 17, 2013
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Did anyone manage to fix this problem?

The exact same thing started happening to me last week, I've tried replacing the HDMI cable and Mini DisplayPort, nothing works.

I also tried turning it off while the cable is attached and TV on - didn't change anything.

Any suggestions would be appreciated, thanks.
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bobtomay

 
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Try booting into Safe mode - let it boot all the way up, then reboot normally.

I cannot be held responsible for the things that come out of my mouth.
In the Windows world, most everything folks don't understand is called a virus.
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Partridge

 
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Quote:
Originally Posted by bobtomay View Post
Try booting into Safe mode - let it boot all the way up, then reboot normally.
Thanks, I just tried that but that didn't work either.
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Ally2098

 
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Hi, it turned out that it was the little white "Moshi" adaptor that connects the Macs to the HDMI lead. What confused us was that it was working intermittently - so for a while it worked fine on mine but not my husband's machine, which meant that we excluded it as a possible cause of trouble. Eventually though it stopped working altogether - confirmed by a visit to our local Apple Store who couldn't get it to work either. A new one - they replaced it for free - hooray - means everything now works perfectly.

Ally
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Partridge

 
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Hi, sorry it took so long to reply.

After I replaced the HDMI cable I thought it might be the adaptor, so I replaced that too. When I use my first adaptor, the blue screen comes up and then theres the option in the menubar to turn mirroring on, when I use my new one I don't even get that option after the blue screen. Neither of them were made by 'Moshi', so I'm not sure if thats the problem.

I'm thinking now it might be something to do with the Thunderbolt port, has anyone had any problems with that?
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bobtomay

 
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Your next troubleshooting step is going to be trying it on another TV &/or take it in to your nearest Apple store.

I cannot be held responsible for the things that come out of my mouth.
In the Windows world, most everything folks don't understand is called a virus.
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Murasaki

 
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Time to Buy a Apple TV I think .. no need for the cables.
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