Well... it's hard to chase down a problem that isn't 100% repeatable in a lab. I have the same S3 with 2 SA s-cards working great. This really makes it look like a Cox config problem to me. I'm on the same system, same hardware, and mine works. When I was installed the installers bailed saying the channels will come in time as the cards update... and they did. Then they crapped out. I put in a trouble ticket and 'magically' it fixed itself over night. I'm convinced they did something on the back end to fix it. I canceled the truck roll and it's been fine since. I have a friend at work going though the same loss of channels / grey screen problems with cable cards in his TV. Common denominator? Cox. Think abut it - they have nothing to lose and everything to gain if we give up on cable cards.