I've searched, and searched, I have tried to get my remote working properly, but I am stuck.

When I switch from TV to DVD everything works fine. The TV changes inputs, the DVD goes on, and viola I watching a movie.

When I go to switch back to TV mode, everything works, with the EXCEPTION of the TV it stays on the DVD input, it does not switch to the Cable/Ant input. The TV still behaves as if it is still looking for the DVD input. I have worked through the Harmony software, but nothing fixes the issue.

For reference the TV is a Samsung HP-S4273

Any thoughts?

Can you fix the problem with the "Help" button? If so, try increasing the inter-device delay. If not, then it's an input configuration problem. I checked your TV (Samsung HP-S4273) device and by default, its Adjust Inputs is configured to use the direct method (I go directly...). The Input labelled "TV" uses the command "InputAntenna". Recheck that. Check that this command (InputAntenna) works properly in device mode. Check that the TV input, in the "Watch TV" activity" is set to "TV".

I have the same problem, caused by the fact that when the DVD/PVR turns off it apparently sends a command to the TV to switch input to itself. I think this is a design fault with the DVD/PVR and there is nothing that can be done until Logitech allow us to specify the order in which commands are sent. (At the moment it switches the TV to Cable/Ant then turns off the PVR, which switches the TV back to that input. If I could switch the order it would work OK)