Last night when I turned on my lcd tv, there was as message on the screen that said no signal (a tv message while in hdmi input mode). I checked the hdmi connection in the back of my 622 and it appeared to be connected firmly. When I disconnected, the tv message changed from 'no signal' to 'check input cable'. Is there a way to check to see if the hdmi port is working properly on my 622? I do not have another hdmi port on my tv nor do I have another hdtv to connect to.