Help getting started with Roku devices, including setup, connecting your device to your TV, linking a Roku device to your account at my.roku.com/link, adding channels, subscribing to services, and more.
There should be one HDMI cable that runs from the switch to the TV. It shouldn't matter which HDMI jack in the TV you use, but make sure you are using the jack on the switch that is labeled as output. For the inputs, again it should not matter which device connects to which input. Just make sure they are the input jacks, and the output jack is the one feeding the TV.
I am assuming the HDMI switch doesn't require power. If it does, naturally make sure it's plugged in. All the connections should be made with everything powered off. This includes the TV and all the devices you are connecting. Power up the switch first (if it's powered), then the TV, then the other devices.
Dan Roku Stick (3600), Ultra (4640), Ultra (4670), Ultra (4800), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.