***Make sure the Yamaha receiver is powered on and that you have clear sight to the front panel display of the receiver.***
To reprogram the scene buttons - use the Yamaha remote to first select the input that you desire - for example HDMI 2 - and then on the Yamaha remote press and hold the scene button that you want to pair up with HDMI 2 until the front of the receiver reads SET COMPLETE. The scene button is now reprogrammed to the input that you selected.