We purchased said item to run with a new Sharp LED TV. All arrived yesterday and we connected everything up and were very impressed with the picture quality when using the built-in TV tuner, but when running the Humax on HDMI 1 the picture quality is very noticeably worse. I can't find any settings to adjust this so I assume something is wrong. The aerial feed comes in into a Y splitter connector that is directly connected to the Humax, while the second split feed from the Y connector runs to the TV. The Humax is connected to the TV via an HDMI cable that was supplied with the TV. This setup replaces a Topfield 5800 box that had the exact same aerial feed and the picture quality was perfect. I appreciate the HDMI cable might be a factor here and that a better quality cable might help but I can't see it making that much of a difference? Are we missing something obvious? I also have a second thread under Home Cinema Buying, Setup and General Advice and Information DVD surround running on HDMI Humax HDR Fox-T2 Problem as were having a problem with that too. Any help would be greatly appreciated.