Hi @jeff9870,
Greetings from the Roku Community!
Please be aware that Roku TV does not support any HDMI that has a WiFi extender. The signal strength when using a wireless network will always depend on the distance between your router and your Roku TV, unless you're using a WiFi extender on your router.
As a workaround, you can use an Ethernet cable to connect directly to your Roku TV to ensure the efficiency of the signal strength. You can refer to this article for further information: How to use USB to connect your Roku streaming device to a wired network.
We hope this helps you out!
Thanks,
Rey
ERey.
Roku Community Moderator