Ultra 4640X issue: can not power off system using "TV Off" tile

roku ultra 4640x

Samsung tv 55HU7250 (2015?)

Onkyo SR393 (2020?)

 

In late 2020 I set this system up.  Connected receiver's ARC output to TV's HDMI (STB) input.  The Roku Ultra HDMI to the receiver's "Streambox" input. I used the Roku remote "home" button to power on the TV and receiver.  The old 4640X remote does not have IR so I assume there is some type of sleep/awake thing going on that tells the receiver to turn on, which turns on the TV, but I really don't understand. Then to power off, I simply went to the "TV Off" tile on my list of channels.  This turned off the TV and receiver together.  A thing of beauty!!!

 

This worked great for nearly 3 years but somehow stopped a few months ago and I haven't been able to figure out the issue.  Now, when I click the home button on the Roku remote, the Ultra receiver LED flashes as usual but only the receiver turns on.  I have to use the Samsung TV remote to turn on the TV.  When I want to power off the system now, the "TV Off" tile just makes a "ba-boop" sound and nothing happens at all.  I use the Samsung TV remote to power the TV off, and the receiver turns off then too.  Also, the TV remote will turn on the receiver along with the TV if I haven't already used the Roku remote first.

 

To make things even worse, a few weeks ago the receiver now usually turns from the "Streambox" input it's is ALWAYS set to, to "TV" within about a minute of being powered on.  So now I need a third remote (the Onkyo receiver remote) to switch it back to Streambox setting to view the Roku.

 

I'm hoping for some help, thanks!