A few months ago my RCA DVR40 Series2 unit died- would not power-up. Ordered a new power supply, replaced it and still no dice. I've been using this crappy DirecTV DVR for the past few months and just cannot take it anymore... I am pretty sure the problem is with the the mainboard (what else is left...). I want to attempt to buy a used unit on FleaBay and swap the the main board of my original dead unit. Here's my question: Will I encounter any problems? After swapping out the board, I will contact DirecTV to reactivate my old unit with my original access card and HDD. My concerns is that there's something on the mainboard that marries it with the HDD preventing me doing what I have stated. Any one ever done this before? Am I putting too much thought into this seemingly simple swap? Thanks in advance.