Unless they will exchange the working TV with yours the easy out is to find another DVD player.
I have a Sharp lcd tv that has worked great for almost 3 yrs. just recently the screen goes blank when the hdmi connection is used. works fine with component. I connected the dvd player to Toshiba TV in bedroom thru hdmi and it works fine. 3 yr warranty on product. Repair people say works fine with direct tv hooked up thru HDMI. they say they replaced the board, got it home- same thing. took back and showed the repair place the problem, dvd player worked fine on their tv, but not on my Sharp. you hear the sound but the screen is blank- doesn't even show the dvd player brand name on screen when fired up with out a dvd in the player. Any help would be much appreciated.