Try swapping the HR20 and the Samsung DVR ....
If the Samsung works again where the HR20 was connected, then something is wrong with the cable feeding the Samsung's room. If the Samsung is still broken at the HR20's location, then the Samsung is defective.
If the Samsung works again where the HR20 was connected, then something is wrong with the cable feeding the Samsung's room. If the Samsung is still broken at the HR20's location, then the Samsung is defective.