I'm having problems with my HDMI port and since I'm quite sure it's related I decided to post it here.
I got my G750JZ two weeks ago. When I connected my TV via HDMI I got the message on the TV screen that the HDMI cable might not work correctly, but despite that everything seemed to work. Soon, I noticed some green lines on dark background and when playing games using the TV as display, the colors sometimes went weird in some areas and the screen was slightly blurry.
There was a dead pixel on the notebook display so I returned it anyway, but sadly, the new JZ doesn't even connect at all to my TV. I get the same message, but there's neither a video nor audio signal. By the way, the HDMI cable is new and not a cheap one and it works perfectly fine with two other different (ASUS) notebooks on the same TV, and I can't really switch to 60pHz either - it's kind of stuck on 59pHz, just like DuffmasterFresh said.
Another thing I noticed is that the cable doesn't quite fit in the port (on both JZ's) - the port doesn't seem to be "deep" enough.
So I'm starting to think that maybe this issue affects many of the notebooks. Anyone else experiencing problems with the HDMI port?