I am having the same issue. I bought two. One works fine. The other one is getting power but now passing any signal.
Mine displays glitched looking lines on the bottom 1/4 of the screen whenever I enable it. The part's that aren't glitched look noticeably better, but the lines make it virtually unplayable. Submitted a ticket 10 days ago and no response. The support number listed on the website is not an active line. I want to love this product, but I believe mine is defective, and it seems like the support is non-existent. See the attached image to see what I am talking about.