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Try the following (if you haven't already)
1. Go to the Harmony setup page.
2. Select 'More options' for the TV.
3. Select 'Adjust inputs'.
4. Select the third button down 'I press a button to bring up an on-screen menu of inputs, a button to cycle between them, and a button to select the input I want'
5. Finish the set up.
If that does not work try this:
1. In the Adjust inputs, select the second option 'I go directly to the input I want (usually for Stereo Receiver, Amplifier, etc.)'
2. When you get to the next page, make sure that the inputs are listed in the order that they are accessed by the TV remote.
3. On the next window which will be the first of the inputs in the list on the previous page, you will set up a command from multiple key presses to directly access that input. e.g. for AV1
First work out the sequence of button presses needed to set that input via the menu. i.e.
MENU (menu screen)
V
ENTER (input screen)
V
ENTER (source screen)
V
V
V
ENTER (AV1)
(I don't know how many down presses are needed in between each ENTER button press exactly)
Work out how many button presses are needed and add more drop down buttons to the Harmony page by selecting 'I send more commands'
Replicate the sequence of button presses by selecting the correct command for each drop down.
This should replicate you pressing that sequence of buttons, but in one command.
When the first input is set up, repeat for all the others.
Download the new setup to the Harmony.
I know it's a bit long winded to set up, but it may solve your problem.
Another way would be to get the discrete codes for each input from Samsung Support and in the Harmony setup page, go to the Support centre, then the Infra red analysis centre, then manual where you can input the codes.
