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Old May 22, 2013, 04:50 PM   #1
ryansebiz
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Question MacBook Air 2012 Mini DisplayPort not working with HDTV

I'm trying to connect my 2012 11" MacBook Air to my Panasonic p60st60 1080p plasma HDTV using a new Monoprice Mini DisplayPort to HDMI adapter & 6' HDMI cable.

My TV displays a "No signal" message and my Mac does not show a secondary display option under System Preferences > Displays. I thought it was a handshake issue so I turned off the TV and Mac, turned on the TV, turned on the Mac, but the problem persists.

Any ideas to get this working? Thank you.
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Old May 22, 2013, 05:46 PM   #2
kemperman
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Pretty sure you need a thunderbolt to hdmi. Not mini displayport.

That should fix the problem
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Old May 22, 2013, 10:17 PM   #3
PBG4 Dude
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Originally Posted by kemperman View Post
Pretty sure you need a thunderbolt to hdmi. Not mini displayport.

That should fix the problem
I use a mDP to HDMI with my 2012 MBA with no issues. It's the $35 adapter sold at the Apple store though.
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Old May 23, 2013, 04:14 AM   #4
Verix
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Try shutting down, insert the cables, boot up. If it doesn't work, reboot with the cables plugged in (and the TV on the correct input of course). If there's no signal getting through there's something wrong.
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Old May 23, 2013, 09:37 AM   #5
old-wiz
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I avoid the monoprice cables; they tend to either not work or work poorly.
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Old May 23, 2013, 11:43 AM   #6
DisplacedMic
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I avoid the monoprice cables; they tend to either not work or work poorly.
i have had the exact opposite experience
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Old May 23, 2013, 02:15 PM   #7
ritmomundo
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Quote:
Originally Posted by ryansebiz View Post
I'm trying to connect my 2012 11" MacBook Air to my Panasonic p60st60 1080p plasma HDTV using a new Monoprice Mini DisplayPort to HDMI adapter & 6' HDMI cable.

My TV displays a "No signal" message and my Mac does not show a secondary display option under System Preferences > Displays. I thought it was a handshake issue so I turned off the TV and Mac, turned on the TV, turned on the Mac, but the problem persists.

Any ideas to get this working? Thank you.
I have a similar problem with my 2010 11" MBA. I don't get any signal on my HDTV when I plug in my mDP-to-HDMI cable. The TV actually flickers a lot (black and white) when I turn on the mirror image setting. I have a newer 2012 MBP and an older 2008 MBP, and it works perfectly fine with both machines, using the same cable, same settings, same TV. I don't know what the issue is.
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Old May 23, 2013, 03:44 PM   #8
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Quote:
Originally Posted by kemperman View Post
Pretty sure you need a thunderbolt to hdmi. Not mini displayport.

That should fix the problem
no, thats not how it works.
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Old May 23, 2013, 03:46 PM   #9
B...
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Quote:
Originally Posted by kemperman View Post
Pretty sure you need a thunderbolt to hdmi. Not mini displayport.

That should fix the problem
MiniDisplay port is old Thunderbolt, which is backwards compatible to MiniDisplay Port.
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Old May 24, 2013, 12:04 AM   #10
eduardrw
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You are using an non apple adapter?

HDMI TV's are also sometimes very fickle and may not recognize the laptop / HDMI adapter.
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Old May 24, 2013, 12:53 AM   #11
heelsbigc
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I've been through a week of connection problems with my mba and tv. It can be really random what works and won't and what fixes the problem.

Try it on another tv.

Try another cable and/or another adapter.

Try connecting to the same tv with another type of cable (vga or dvi) Strangely enough, this is actually what "fixed" my issue. VGA wouldn't work, changed to hdmi and it worked, reconnected the vga and it worked again.

These machines are very flakey (the TVs and the computers). Keep trying, something will eventually work.
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Old May 26, 2013, 08:46 PM   #12
ryansebiz
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Quote:
Originally Posted by heelsbigc View Post
I've been through a week of connection problems with my mba and tv. It can be really random what works and won't and what fixes the problem.

Try it on another tv.

Try another cable and/or another adapter.

Try connecting to the same tv with another type of cable (vga or dvi) Strangely enough, this is actually what "fixed" my issue. VGA wouldn't work, changed to hdmi and it worked, reconnected the vga and it worked again.

These machines are very flakey (the TVs and the computers). Keep trying, something will eventually work.
That worked! Very flaky indeed. Thank you.
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