Using a Comcast Motorola digital box connected via RF to my Panasonic DMR-EH75V. I am sending out the signal to the monitor via HDMI. So far I have been able to seemingly record to HDD and see the thumbnails in the menu but when I play there is nothing but black- no video or audio. I went through the manual and setup the proper HDMI settings. Is there something missing here or is there just nothing but black being recorded in the first place? I need help figuring this out because I have heard rumors about not being able to record from a Comcast Digital Box. Also, I was not succesful in getting the Panasonic recorder to work with the TV guide option with the Comcast box either. Any help would be most appreciated. Thanks!