Problem using mDP-DVI-D adapter.

Hi!
This is my first post on this forum since I just bought my very first mac! Everything has been painless until today.
Since I had a DVI-D - HDMI cable from before (which I used with my old PC to connect to my TV) I figured I'd go and buy myself the DVI adapter.
The problem is, after everything is hooked up and ready to go, I get no picture at all on my TV.
BUT my macbook do find it and recognize it in the OS.
There's nothing wrong with the cable since I tried connecting it to my PC again and I've also tried another DVI-DVI cable. I've also tried two different
TVs (one LCD and one plasma, both Samsung) and also an ASUS LCD desktop monitor. The problem occurs on all the monitors.
On the monitor settings I do see that it has found a Samsung TV or whatever external monitor I'm using, I can change resolutions, switch between mirror and extended desktop and I can also move the cursor outside the windowframe where it would show on the external monitor if it had any picture.
I've read a couple of posts here and also googled it but is it safe to say that there's something wrong with the brand new adapter I bought or have I missed something?
/Marcus
Macbook Pro 13" 2.3GHz - 2011

As I suspected it was a faulty adapter, went and returned it to the store and bought Apples own DVI adapter and it works!

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Hello!
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One word of advice. I just hooked up my mini to my 32" Lowe HD TV using a DVI to HDMI cable and it doesn't just work. The native resolution of the TV is not available for whatever reason so I have to bodge another resolution which looks terrible. When I plug my powerbook in via a DVI to VGA connector it just does work selecting the correct resolution automatically.
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Problem using mDP-DVI-D adapter.

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