I first seen this at the Cleveland, AVS forum yesterday, so I'll copy and paste what I posted there. "I'm getting this here too near W150/Puritas, 56.1, no subchannels, no audio, I must be on the fringe as it comes and goes. I thought Channel 56 was in Detroit? But then don't know if that's just PSIP in Detroit now. The info button said there is no info available for this channel. Maybe WLFM's new digital channel (LOL), remember they had the WD logo on analog 6 when they were testing it. Image below taken by cell phone, some of the trim of the TV is showing as well as the TV's lit Vizio logo." The Dish logo is actually white, not bluish as my cell phone took it. (I think the OP is in Lake or Geauga County).
http://www.dannykewl.com/misc/channel56.jpg
http://www.dannykewl.com/misc/channel56.jpg