I am having trouble getting HDMI to work. I used it initially to test functionality and had no issues. But it hasn't worked since. I've tried multiple cables and different TVs with nothing. I can plug BB Playbook in on same setup with no issues. I can't really find any setting in control panel other than "adjust commonly used items" under hardware and display which has absolutely nothing for hdmi. Is there something im missing? I do not have MS OEM cable, but my cable worked initially. I have not done a reset and hoping to avoid if possible. Any suggestions?