I am a new owner of a Greystone 34QB with a Genesis tech 2.0 system installed. While watching a DVD out tv started flickering and then the video went almost completely dark. First thought it was a tv problem but found the picture to be fine with video from other sources. I then ruled out the DVD disk as other disks flicked and then goes nearly completely dark. Again, not a tv problem. Also, the entire unit seems to completely lock up occasionally where none of the controls on the unit rsponds with either the buttons on the front or with the remote. Thoughts on what the issue might be? Thanks