I needed another HD box from Comcast which was going to cost me $15 a month. Found out for $15.75 I could get an HD DVR from them. I also changed packages that saved me $20 a month for one year. That gave me a second comcast DVR.I picked up both units at the local office. Hooked them up and one worked and one didn't. They are sending a guy out out Fri to see what's wrong. Looks to me like the box is defective. Comcast tech on phone tried to say it was my electrical outlet even though the unit powered on and got a picture but non of the controls would work.