I just acquired the "Kanex Mini DisplayPort to HDMI Cable with Audio Support (10 ft.)" directly from Apple (http://store.apple.com/us/product/H4637ZM/A?fnode=MTY1NDA3Ng). It does not function and will NOT send video to the external HDMI screen (at this point I am not concerned about audio). The external screen is a LG2762D TV.
Details:
I have a MacBook Pro 13" (early 2011, purchased in July 2011) with the current OS 10.7.2.
I know the mini display port and LG TV both function because I can connect to the TV via the mini display port to DVI adapter on the MacBook and using the DVI input port on the TV.
When I use the Kanex Mini DisplayPort to HDMI Cable and connect it the HDMI input port of the LG TV (of course first assuring the TV input port, HDMI1 or HDMI2, is set correctly to active on theTV) what happens is the MacBook Pro detects the LG display BUT there is NO IMAGE on the TV and the TV says "No Input Signal" or something to that effect.
So, the MacBook Pro detects the TV but no display can be seen on the TV.
I have talked with AppleCare and they tell me the cable is faulty and needs to be replaced.
I am a reasonably technical person and havea good understanding of troubleshooting and I have come to the same conclusion - that the cable is faulty.
However, do any experts out there have any comments or recommendations? Can I expect the replacement cable to work or am I better off with a different product (eg: another mini display port to HDMI adapter together with appropriate HDMI-HDMI cable to get close to the total 10' length of the Kanex)?
Thanks.
PS: Kanex does not appear to have a phone number so I was only able to submit a support request on-line. I have not yet received a reply.
(I cross posted this to https://discussions.apple.com/thread/2180106?answerId=16890124022#16890124022)