None of my HD images are showing. When I select Digital Input, all I get is a black screen with the occasional flicker. My HDMI inputs no longer work, nor does my Over-the-Air HD. I am thinking the HD processor or something inside is knocked loose, since my 1 yr old daughter as walked/ran into the TV on more than one occasion. Is there any idea if there is likely a module I can replace, or are there any troubleshooting techniques I can use?