For a year my TV (SONY KDL-40Z4500 102cm) purchased in October 2009 and which is also a great product, was difficult to manage channel change and volume. This because of an unworthy capricious control the Sony brand. I'm not the only one to complain remote controls that were sold with the Bravia series. This remote control (RM-ED012) identical ordered for a nominal fee and received 48 hours gives me satisfaction. Everything is back to normal. Provided that such production is more serious!