I can't say I had the same issue as you although the VSX-1123 is still a work in progress on my end. My Uverse STB, once connected to the VSX-1123 Sat/Cbl HDMI came right up when I pressed the 1123 Remote button for Sat/Cbl. There are some 1123 Remote setting that can make a difference. Namely Receiver/Video Parameters. If Video Conversion is ON, make sure what RES is set for. For example I can't run at the 4K setting because I don't have a 4K monitor. Usually I either keep Video Conversion OFF (since I am already getting a 1080i signal) or if ON 1080p/24p, 1080p, 1080i, or PURE. I have an LCD/LED flat screen so 720 or 480 settings, in addition to Auto look bad.