I have Comcast cable television and a HD DVR. I pay $16/month rent for the HD DVR. The DVR is a Motorola DCH3416. I found one online for $50.00. It is identical with same model number as the one I am renting.
I called Comcast and the non-tech savvy, customer service person said that it will not work.
Now, I cannot believe this to be true. There must be a fairly worthwhile way to make this happen.