With my TV device set up using SONY 0000 94% of the keys are used. The transport keys defaulted to controlling my installed DVD device, a Pioneer 414. I'm guessing that is a "feature" of the Cinema line... assume you want control of your DVD device when in TV mode. Record and Program do nothing, the 1-4L and macro keys do nothing, but all my other keys emit some sort of IR when pressed in my TV device. I put channel guide on the Program button and DVD Open/Close tray on the transort RECORD button. 38 buttons were emitting by default when first programmed.

Dave