So I received my new Iffalcon k2a 4K tv today. Every other device is working fine, however the Tata sky box is only wokring in 576p mode. Whenever I try to switch to 720p or 1080i in the set top box, the screen goes blank and a no signal message appear. My older Sony HD tv however has no problem and is receiving signal in 1080i without any issues. Can anyone suggest any solutions? I have tries all the hdmi ports and they all have same issue. Even tried 3 different HDMI cables.