I have an elderly friend who called me over to "fix" her remote. She has an RC65 remote running an old D12-100. What has happened (other than the batteries were also dead) is the remote won't turn her TV off and on from the On and Off buttons. It's an old RCA tube TV. Now, what is odd is I can find several codes that work, and the first three codes in the RCA list work fine when the remote switch is in the TV position. I can turn the TV off and on with the PWR button. Also working just fine is pass through - volume, mute, and input select work fine in any mode. Simply put, the remote just won't turn the TV on and off from the On and Off remote buttons, with any code. Thinking this was some weird issue with the remote, I took two of my spare remotes over, an old 25 and another RC65, they exhibited the same behavior. I'm stumped - suggestions? Thanks!