Thanks for the tip. I'm out of town for Christmas but next week, I'll be back at the bedside of "the patient" TiVo that has been running on component cables since my posting above. I've searched far and wide on the Internet and tried everything I could imagine (but not what you suggested). The problem you describe fits all the symptoms and the swapping I've done. Can you tell if the problem is the PC board-to-connector solder connections or the connector pins inside the connector?