My TV is a Panasonic CT-2013SA (1992) and I found code 0250 to work. I was hoping that the remote would have a "tv/video" button to switch to "aux." I think this is the way it was on the origninal remote. Interestingly, I think I got the TV into "aux" after I moved it and I had a universal remote at that time (I think) and I could not get it out of "aux" for a few hours. That story may seem somewhat pointless and it is, but it makes up for it with suspensefulness and entertainment value.

I will get a new TV soon I hope. I been hoping for a long time though.