I just got a Samsung T240HD which comes with a digital tv tuner (QAM tuner). However, I have not been able to get any HD channels (not even local OTA HD which I'm sure they have where I am). In the settings there are three signal types (STD, HRC, and IRC). I've tried all three to no avail. Is there any trick that you have to do with the monitor to get it to recognize HD channels? Thanks for the help.