@cara1728
Sounds like the HDMI cable may not be being detected by the TV, resulting in not displaying the Input as available. If I unplug a HDMI device from my Mitsubishi, it will not offer me that Input as "available". It won't even show up as an "Input". If I plug a device into the HDMI, the TV then alerts me that a device is present on that HDMI port.
On other TVs, you can select a HDMI port (HDMI 1, HDMI2, HDMI3, etc) even if something is not plugged into those ports. If I switch to one of these without a device in the port, I either get a blue screen or no signal. (My Emerson does this).
I would see if messing with the HDMI cables solves the issue. Try swapping them to different HDMI ports, reversing the ends, making sure everything is properly seated in the ports and the Roku device ,etc. Next, I would verify that CEC is enabled. This just helps with HDMI communication. Using your TV remote (not Roku remote), most CEC for Vizio is located under Menu..System..CEC. Just select "Enable"
Sometimes just unplugging and replugging the HDMI cable back in will re-establish connection but you should not have to do this. The restarting of your TV and the Roku is kind of confirming this communication loss. Restarting should establish reconnection. But again, you shouldn't have to do this either on a regular basis.
It could be a bad Roku device, but first try the cord inspection and the CEC enabling and feel free to post back with an update.
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102
