Mini Display to HDMI output not working.

[rossmadden]

Hi everyone.

I connect my Macbook Pro to my tv using the MD/HDMI lead. It worked completely fine but all of a sudden it isn't working.

When I plug the lead in the blue screen comes up as usual, and when i change to the right input channel on my tv the blue screen again flashes as it would normally, but my macbook can't detect the tv.
Nothing has changed, I haven't updated since last week. So i'm completely stuck.

Any ideas?

EDIT: I've already reset my PRAM.

 

[clickclickw00t]

What year MBP?

I have the same problem with my 2011 MBP. I get video playing fine, but I do not get audio. I got it the first day I had it (audio over HDMI) and I haven't been able to get it working since.

 

[rossmadden]

the 2011 13".
have you changed the audio output settings to HDMI?

 

[golgo1313]

me too!

i've got a 2011 15" mbp. when using the kanex miniDP to hdmi adapter (which i bought for my 2008 mbp... it has three inputs, miniDP, optical audio in, and usb for power, one output hdmi) it works perfectly. when using a single miniDP to hdmi adapter that i bought from macsales as well as another moshi brand i got yesterday, neither of them work. i need the limited usb ports...

since the older kanex works, i'm inclined to think apple has changed something. i have NOT tested either of the miniDP adapters on a 2010 mbp. i don't have access to one.

when i plug in the macsales adapter, the screen goes blue for a second on the mbp. then nothing. the moshi does even less... nothing.

 

[golgo1313]

just tested both the newertech and moshi on my wife's 13" mbp. no signal. so it must be something in my setup, and not my 15" mbp.

*sigh*