HELP! My HD400 doesn't respond to my remotes anymore! Neither remote works - nor does my universal remote! I don't know what the deal is - it works fine if I use the buttons on the front panel! I tried leaving it unplugged for a few minutes, but no love! The remote seem to work - I can change settings on my TV, but nothing on the remotes! Any trouble shooting ideas? I'm going to leave it completely unplugged tonight and take out the card - maybe it'll be better in the morning, but help!!!!