I have a Sony Blu-ray N9200W 5:1 Home theatre system. I haven't had it on for about 3 months. For some reason I only get a "no signal" when I input to the appropriate HDMI that matches on the TV (an LG 42LH50YD by the way). I have used both a HDMI cable and an Optical Digital Cord. I can play a DVD but only get the sound through the speakers. I can't even get the menu up to the screen Any ideas on a fix? Thanks you.