Hi, I'm sorry to extend the thread so much later, but I have a very similar problem, but with Charter cable. Same Sony model and everything. Would it work the same way? I've lost the stock remote, and was wondering if I could use either, another sony remote I have for a receiver unit (Sony RM-AAU055) or my Charter remote. I'm not exactly sure how those EFC keys work, as I see nothing like that on my charter remote. Any help would be appreciated.